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NESPED - Generative AI Reaserch 4

student_assessment

What are the ids of the students who either registered or attended a course?

hard

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT student_id FROM student_course_registrations UNION SELECT student_id FROM student_course_attendance

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'people': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'students': ['student_id', 'student_details'], 'courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'people_addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'student_course_registrations': ['student_id', 'course_id', 'registration_date'], 'student_course_attendance': ['student_id', 'course_id', 'date_of_attendance'], 'candidates': ['candidate_id', 'candidate_details'], 'candidate_assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'student_course_registrations': ['student_id'], 'student_course_attendance': ['student_id'] }

TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), ) Possible JOINs: Student_Course_Attendance.student_id = Student_Course_Registrations.student_id

TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Possible JOINs: Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id

student_assessment

Find the id of courses which are registered or attended by student whose id is 121?

hard

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT course_id FROM student_course_registrations WHERE student_id = 121 UNION SELECT course_id FROM student_course_attendance WHERE student_id = 121

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'people': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'students': ['student_id', 'student_details'], 'courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'people_addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'student_course_registrations': ['student_id', 'course_id', 'registration_date'], 'student_course_attendance': ['student_id', 'course_id', 'date_of_attendance'], 'candidates': ['candidate_id', 'candidate_details'], 'candidate_assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'student_course_registrations': ['student_id', 'course_id'], 'student_course_attendance': ['student_id', 'course_id'] }

TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), ) Possible JOINs: Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id

TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Possible JOINs: Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id

student_assessment

What are the ids of the courses that are registered or attended by the student whose id is 121?

hard

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT course_id FROM student_course_registrations WHERE student_id = 121 UNION SELECT course_id FROM student_course_attendance WHERE student_id = 121

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'people': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'students': ['student_id', 'student_details'], 'courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'people_addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'student_course_registrations': ['student_id', 'course_id', 'registration_date'], 'student_course_attendance': ['student_id', 'course_id', 'date_of_attendance'], 'candidates': ['candidate_id', 'candidate_details'], 'candidate_assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'student_course_registrations': ['student_id', 'course_id'], 'student_course_attendance': ['student_id', 'course_id'] }

TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), ) Possible JOINs: Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id

TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Possible JOINs: Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id

student_assessment

What are all info of students who registered courses but not attended courses?

hard

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT * FROM student_course_registrations WHERE student_id NOT IN (SELECT student_id FROM student_course_attendance)

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'people': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'students': ['student_id', 'student_details'], 'courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'people_addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'student_course_registrations': ['student_id', 'course_id', 'registration_date'], 'student_course_attendance': ['student_id', 'course_id', 'date_of_attendance'], 'candidates': ['candidate_id', 'candidate_details'], 'candidate_assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'student_course_registrations': ['student_id'], 'student_course_attendance': ['student_id'] }

TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), ) Possible JOINs: Student_Course_Attendance.student_id = Student_Course_Registrations.student_id

TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Possible JOINs: Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id

student_assessment

What are all details of the students who registered but did not attend any course?

hard

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT * FROM student_course_registrations WHERE student_id NOT IN (SELECT student_id FROM student_course_attendance)

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'people': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'students': ['student_id', 'student_details'], 'courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'people_addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'student_course_registrations': ['student_id', 'course_id', 'registration_date'], 'student_course_attendance': ['student_id', 'course_id', 'date_of_attendance'], 'candidates': ['candidate_id', 'candidate_details'], 'candidate_assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'student_course_registrations': ['student_id'], 'student_course_attendance': ['student_id'] }

TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), ) Possible JOINs: Student_Course_Attendance.student_id = Student_Course_Registrations.student_id

TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Possible JOINs: Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id

student_assessment

List the id of students who registered course statistics in the order of registration date.

hard

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT student_course_registrations.student_id FROM courses JOIN student_course_registrations ON courses.course_id = student_course_registrations.course_id WHERE courses.course_name = "statistics" ORDER BY student_course_registrations.registration_date

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'people': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'students': ['student_id', 'student_details'], 'courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'people_addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'student_course_registrations': ['student_id', 'course_id', 'registration_date'], 'student_course_attendance': ['student_id', 'course_id', 'date_of_attendance'], 'candidates': ['candidate_id', 'candidate_details'], 'candidate_assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'courses': ['course_id', 'course_name'], 'student_course_registrations': ['student_id', 'course_id', 'registration_date'] }

TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Possible JOINs: Student_Course_Registrations.course_id = Courses.course_id

TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Possible JOINs: Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id

student_assessment

What are the ids of the students who registered course statistics by order of registration date?

hard

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT student_course_registrations.student_id FROM courses JOIN student_course_registrations ON courses.course_id = student_course_registrations.course_id WHERE courses.course_name = "statistics" ORDER BY student_course_registrations.registration_date

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'people': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'students': ['student_id', 'student_details'], 'courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'people_addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'student_course_registrations': ['student_id', 'course_id', 'registration_date'], 'student_course_attendance': ['student_id', 'course_id', 'date_of_attendance'], 'candidates': ['candidate_id', 'candidate_details'], 'candidate_assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'courses': ['course_id', 'course_name'], 'student_course_registrations': ['student_id', 'course_id', 'registration_date'] }

TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Possible JOINs: Student_Course_Registrations.course_id = Courses.course_id

TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Possible JOINs: Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id

student_assessment

List the id of students who attended statistics courses in the order of attendance date.

hard

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT student_course_attendance.student_id FROM courses JOIN student_course_attendance ON courses.course_id = student_course_attendance.course_id WHERE courses.course_name = "statistics" ORDER BY student_course_attendance.date_of_attendance

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'people': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'students': ['student_id', 'student_details'], 'courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'people_addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'student_course_registrations': ['student_id', 'course_id', 'registration_date'], 'student_course_attendance': ['student_id', 'course_id', 'date_of_attendance'], 'candidates': ['candidate_id', 'candidate_details'], 'candidate_assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'courses': ['course_id', 'course_name'], 'student_course_attendance': ['student_id', 'course_id', 'date_of_attendance'] }

TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), )

TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Possible JOINs: Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id

student_assessment

What are the ids of the students who attended courses in the statistics department in order of attendance date.

hard

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT student_course_attendance.student_id FROM courses JOIN student_course_attendance ON courses.course_id = student_course_attendance.course_id WHERE courses.course_name = "statistics" ORDER BY student_course_attendance.date_of_attendance

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'people': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'students': ['student_id', 'student_details'], 'courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'people_addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'student_course_registrations': ['student_id', 'course_id', 'registration_date'], 'student_course_attendance': ['student_id', 'course_id', 'date_of_attendance'], 'candidates': ['candidate_id', 'candidate_details'], 'candidate_assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'courses': ['course_id', 'course_name'], 'student_course_attendance': ['student_id', 'course_id', 'date_of_attendance'] }

TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), )

TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Possible JOINs: Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id

bike_1

Give me the dates when the max temperature was higher than 85.

easy

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT date FROM weather WHERE max_temperature_f > 85

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['date', 'max_temperature_f'] }

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

What are the dates with a maximum temperature higher than 85?

easy

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT date FROM weather WHERE max_temperature_f > 85

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['date', 'max_temperature_f'] }

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

What are the names of stations that have latitude lower than 37.5?

easy

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT name FROM station WHERE lat < 37.5

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'name', 'lat'] }

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Possible JOINs:

bike_1

What are the names of all stations with a latitude smaller than 37.5?

easy

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT name FROM station WHERE lat < 37.5

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'name', 'lat'] }

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Possible JOINs:

bike_1

For each city, return the highest latitude among its stations.

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT city , max(lat) FROM station GROUP BY city

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'lat', 'city'] }

TABLE station ( station.id (INTEGER), station.lat (NUMERIC), station.city (TEXT), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Possible JOINs:

bike_1

For each city, what is the highest latitude for its stations?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT city , max(lat) FROM station GROUP BY city

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'lat', 'city'] }

TABLE station ( station.id (INTEGER), station.lat (NUMERIC), station.city (TEXT), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Possible JOINs:

bike_1

Give me the start station and end station for the trips with the three oldest id.

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT start_station_name , end_station_name FROM trip ORDER BY id LIMIT 3

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'start_station_name', 'end_station_name'] }

TABLE trip ( trip.id (INTEGER), trip.start_station_name (TEXT), trip.end_station_name (TEXT), ) Possible JOINs:

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

What is the station station and end station for the trips with the three smallest ids?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT start_station_name , end_station_name FROM trip ORDER BY id LIMIT 3

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'start_station_name', 'end_station_name'] }

TABLE trip ( trip.id (INTEGER), trip.start_station_name (TEXT), trip.end_station_name (TEXT), ) Possible JOINs:

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

What is the average latitude and longitude of stations located in San Jose city?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT avg(lat) , avg(long) FROM station WHERE city = "San Jose"

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'lat', 'long', 'city'] }

TABLE station ( station.id (INTEGER), station.lat (NUMERIC), station.long (NUMERIC), station.city (TEXT), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Possible JOINs:

bike_1

What is the average latitude and longitude in San Jose?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT avg(lat) , avg(long) FROM station WHERE city = "San Jose"

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'lat', 'long', 'city'] }

TABLE station ( station.id (INTEGER), station.lat (NUMERIC), station.long (NUMERIC), station.city (TEXT), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Possible JOINs:

bike_1

What is the id of the trip that has the shortest duration?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT id FROM trip ORDER BY duration LIMIT 1

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'duration'] }

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), ) Possible JOINs:

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

What is the id of the shortest trip?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT id FROM trip ORDER BY duration LIMIT 1

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'duration'] }

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), ) Possible JOINs:

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

What is the total and maximum duration of trips with bike id 636?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT sum(duration) , max(duration) FROM trip WHERE bike_id = 636

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'duration', 'bike_id'] }

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.bike_id (INTEGER), ) Possible JOINs:

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

What is the total and maximum duration for all trips with the bike id 636?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT sum(duration) , max(duration) FROM trip WHERE bike_id = 636

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'duration', 'bike_id'] }

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.bike_id (INTEGER), ) Possible JOINs:

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

For each zip code, return the average mean temperature of August there.

hard

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT zip_code , avg(mean_temperature_f) FROM weather WHERE date LIKE "8/%" GROUP BY zip_code

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['date', 'mean_temperature_f', 'zip_code'] }

TABLE weather ( weather.date (TEXT), weather.mean_temperature_f (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

For each zip code, what is the average mean temperature for all dates that start with '8'?

hard

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT zip_code , avg(mean_temperature_f) FROM weather WHERE date LIKE "8/%" GROUP BY zip_code

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['date', 'mean_temperature_f', 'zip_code'] }

TABLE weather ( weather.date (TEXT), weather.mean_temperature_f (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

From the trip record, find the number of unique bikes.

easy

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT count(DISTINCT bike_id) FROM trip

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'bike_id'] }

TABLE trip ( trip.id (INTEGER), trip.bike_id (INTEGER), ) Possible JOINs:

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

How many different bike ids are there?

easy

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT count(DISTINCT bike_id) FROM trip

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'bike_id'] }

TABLE trip ( trip.id (INTEGER), trip.bike_id (INTEGER), ) Possible JOINs:

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

What is the number of distinct cities the stations are located at?

easy

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT count(DISTINCT city) FROM station

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'city'] }

TABLE station ( station.id (INTEGER), station.city (TEXT), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Possible JOINs:

bike_1

How many different cities have these stations?

easy

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT count(DISTINCT city) FROM station

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'city'] }

TABLE station ( station.id (INTEGER), station.city (TEXT), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Possible JOINs:

bike_1

How many stations does Mountain View city has?

easy

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT COUNT(*) FROM station WHERE city = "Mountain View"

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'city'] }

TABLE station ( station.id (INTEGER), station.city (TEXT), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Possible JOINs:

bike_1

How many stations are in Mountain View?

easy

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT COUNT(*) FROM station WHERE city = "Mountain View"

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'city'] }

TABLE station ( station.id (INTEGER), station.city (TEXT), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Possible JOINs:

bike_1

Return the unique name for stations that have ever had 7 bikes available.

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT DISTINCT station.name FROM station JOIN status ON station.id = status.station_id WHERE status.bikes_available = 7

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'name'], 'status': ['station_id', 'bikes_available'] }

TABLE station ( station.id (INTEGER), station.name (TEXT), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), ) Possible JOINs: status.station_id = station.id

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Possible JOINs: status.station_id = station.id

bike_1

What are the different names for each station that has ever had 7 bikes available?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT DISTINCT station.name FROM station JOIN status ON station.id = status.station_id WHERE status.bikes_available = 7

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'name'], 'status': ['station_id', 'bikes_available'] }

TABLE station ( station.id (INTEGER), station.name (TEXT), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), ) Possible JOINs: status.station_id = station.id

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Possible JOINs: status.station_id = station.id

bike_1

Which start station had the most trips starting from August? Give me the name and id of the station.

extra

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT start_station_name , start_station_id FROM trip WHERE start_date LIKE "8/%" GROUP BY start_station_name ORDER BY COUNT(*) DESC LIMIT 1

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'start_date', 'start_station_name', 'start_station_id'] }

TABLE trip ( trip.id (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), ) Possible JOINs:

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

What are the start station's name and id for the one that had the most start trips in August?

extra

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT start_station_name , start_station_id FROM trip WHERE start_date LIKE "8/%" GROUP BY start_station_name ORDER BY COUNT(*) DESC LIMIT 1

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'start_date', 'start_station_name', 'start_station_id'] }

TABLE trip ( trip.id (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), ) Possible JOINs:

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

Which bike traveled the most often in zip code 94002?

extra

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT bike_id FROM trip WHERE zip_code = 94002 GROUP BY bike_id ORDER BY COUNT(*) DESC LIMIT 1

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'bike_id', 'zip_code'] }

TABLE trip ( trip.id (INTEGER), trip.bike_id (INTEGER), trip.zip_code (INTEGER), ) Possible JOINs:

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

What is the id of the bike that traveled the most in 94002?

extra

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT bike_id FROM trip WHERE zip_code = 94002 GROUP BY bike_id ORDER BY COUNT(*) DESC LIMIT 1

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'bike_id', 'zip_code'] }

TABLE trip ( trip.id (INTEGER), trip.bike_id (INTEGER), trip.zip_code (INTEGER), ) Possible JOINs:

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

How many days had both mean humidity above 50 and mean visibility above 8?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT COUNT(*) FROM weather WHERE mean_humidity > 50 AND mean_visibility_miles > 8

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['mean_humidity', 'mean_visibility_miles'] }

TABLE weather ( weather.mean_humidity (INTEGER), weather.mean_visibility_miles (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

What is the number of days that had an average humity above 50 and an average visibility above 8?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT COUNT(*) FROM weather WHERE mean_humidity > 50 AND mean_visibility_miles > 8

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['mean_humidity', 'mean_visibility_miles'] }

TABLE weather ( weather.mean_humidity (INTEGER), weather.mean_visibility_miles (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

What is the latitude, longitude, city of the station from which the shortest trip started?

hard

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT station.lat , station.long , station.city FROM station JOIN trip ON station.id = trip.start_station_id ORDER BY trip.duration LIMIT 1

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'lat', 'long', 'city'], 'trip': ['id', 'duration', 'start_station_id'] }

TABLE station ( station.id (INTEGER), station.lat (NUMERIC), station.long (NUMERIC), station.city (TEXT), ) TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_station_id (INTEGER), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

What is the latitude, longitude, and city of the station from which the trip with smallest duration started?

hard

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT station.lat , station.long , station.city FROM station JOIN trip ON station.id = trip.start_station_id ORDER BY trip.duration LIMIT 1

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'lat', 'long', 'city'], 'trip': ['id', 'duration', 'start_station_id'] }

TABLE station ( station.id (INTEGER), station.lat (NUMERIC), station.long (NUMERIC), station.city (TEXT), ) TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_station_id (INTEGER), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

What are the ids of stations that are located in San Francisco and have average bike availability above 10.

hard

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT id FROM station WHERE city = "San Francisco" INTERSECT SELECT station_id FROM status GROUP BY station_id HAVING avg(bikes_available) > 10

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'city'], 'status': ['station_id', 'bikes_available'] }

TABLE station ( station.id (INTEGER), station.city (TEXT), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), ) Possible JOINs: status.station_id = station.id

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Possible JOINs: status.station_id = station.id

bike_1

What are the ids of the stations in San Francisco that normally have more than 10 bikes available?

hard

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT id FROM station WHERE city = "San Francisco" INTERSECT SELECT station_id FROM status GROUP BY station_id HAVING avg(bikes_available) > 10

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'city'], 'status': ['station_id', 'bikes_available'] }

TABLE station ( station.id (INTEGER), station.city (TEXT), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), ) Possible JOINs: status.station_id = station.id

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Possible JOINs: status.station_id = station.id

bike_1

What are the names and ids of stations that had more than 14 bikes available on average or were installed in December?

extra

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT station.name , station.id FROM station JOIN status ON station.id = status.station_id GROUP BY status.station_id HAVING avg(status.bikes_available) > 14 UNION SELECT name , id FROM station WHERE installation_date LIKE "12/%"

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'name', 'installation_date'], 'status': ['station_id', 'bikes_available'] }

TABLE station ( station.id (INTEGER), station.name (TEXT), station.installation_date (TEXT), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), ) Possible JOINs: status.station_id = station.id

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Possible JOINs: status.station_id = station.id

bike_1

What are the names and ids of all stations that have more than 14 bikes available on average or had bikes installed in December?

extra

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT station.name , station.id FROM station JOIN status ON station.id = status.station_id GROUP BY status.station_id HAVING avg(status.bikes_available) > 14 UNION SELECT name , id FROM station WHERE installation_date LIKE "12/%"

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'name', 'installation_date'], 'status': ['station_id', 'bikes_available'] }

TABLE station ( station.id (INTEGER), station.name (TEXT), station.installation_date (TEXT), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), ) Possible JOINs: status.station_id = station.id

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Possible JOINs: status.station_id = station.id

bike_1

What is the 3 most common cloud cover rates in the region of zip code 94107?

extra

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT cloud_cover FROM weather WHERE zip_code = 94107 GROUP BY cloud_cover ORDER BY COUNT (*) DESC LIMIT 3

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['cloud_cover', 'zip_code'] }

TABLE weather ( weather.cloud_cover (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

What are the 3 most common cloud covers in the zip code of 94107?

extra

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT cloud_cover FROM weather WHERE zip_code = 94107 GROUP BY cloud_cover ORDER BY COUNT (*) DESC LIMIT 3

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['cloud_cover', 'zip_code'] }

TABLE weather ( weather.cloud_cover (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

What is the zip code in which the average mean sea level pressure is the lowest?

hard

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT zip_code FROM weather GROUP BY zip_code ORDER BY avg(mean_sea_level_pressure_inches) LIMIT 1

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['mean_sea_level_pressure_inches', 'zip_code'] }

TABLE weather ( weather.mean_sea_level_pressure_inches (NUMERIC), weather.zip_code (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

What is the zip code that has the lowest average mean sea level pressure?

hard

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT zip_code FROM weather GROUP BY zip_code ORDER BY avg(mean_sea_level_pressure_inches) LIMIT 1

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['mean_sea_level_pressure_inches', 'zip_code'] }

TABLE weather ( weather.mean_sea_level_pressure_inches (NUMERIC), weather.zip_code (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

What is the average bike availability in stations that are not located in Palo Alto?

extra

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT avg(bikes_available) FROM status WHERE station_id NOT IN (SELECT id FROM station WHERE city = "Palo Alto")

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'status': ['station_id', 'bikes_available'], 'station': ['id', 'city'] }

TABLE station ( station.id (INTEGER), station.city (TEXT), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), ) Possible JOINs: status.station_id = station.id

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Possible JOINs: status.station_id = station.id

bike_1

What is the average bike availablility for stations not in Palo Alto?

extra

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT avg(bikes_available) FROM status WHERE station_id NOT IN (SELECT id FROM station WHERE city = "Palo Alto")

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'status': ['station_id', 'bikes_available'], 'station': ['id', 'city'] }

TABLE station ( station.id (INTEGER), station.city (TEXT), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), ) Possible JOINs: status.station_id = station.id

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Possible JOINs: status.station_id = station.id

bike_1

What is the average longitude of stations that never had bike availability more than 10?

extra

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT avg(long) FROM station WHERE id NOT IN (SELECT station_id FROM status GROUP BY station_id HAVING max(bikes_available) > 10)

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'long'], 'status': ['station_id', 'bikes_available'] }

TABLE station ( station.id (INTEGER), station.long (NUMERIC), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), ) Possible JOINs: status.station_id = station.id

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Possible JOINs: status.station_id = station.id

bike_1

What is the mean longitude for all stations that have never had more than 10 bikes available?

extra

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT avg(long) FROM station WHERE id NOT IN (SELECT station_id FROM status GROUP BY station_id HAVING max(bikes_available) > 10)

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'long'], 'status': ['station_id', 'bikes_available'] }

TABLE station ( station.id (INTEGER), station.long (NUMERIC), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), ) Possible JOINs: status.station_id = station.id

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Possible JOINs: status.station_id = station.id

bike_1

When and in what zip code did max temperature reach 80?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT date , zip_code FROM weather WHERE max_temperature_f >= 80

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['date', 'max_temperature_f', 'zip_code'] }

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

What zip codes have a station with a max temperature greater than or equal to 80 and when did it reach that temperature?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT date , zip_code FROM weather WHERE max_temperature_f >= 80

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['date', 'max_temperature_f', 'zip_code'] }

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

Give me ids for all the trip that took place in a zip code area with average mean temperature above 60.

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT trip.id FROM trip JOIN weather ON trip.zip_code = weather.zip_code GROUP BY weather.zip_code HAVING avg(weather.mean_temperature_f) > 60

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'zip_code'], 'weather': ['mean_temperature_f', 'zip_code'] }

TABLE trip ( trip.id (INTEGER), trip.zip_code (INTEGER), ) TABLE weather ( weather.mean_temperature_f (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

For each zip code, find the ids of all trips that have a higher average mean temperature above 60?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT trip.id FROM trip JOIN weather ON trip.zip_code = weather.zip_code GROUP BY weather.zip_code HAVING avg(weather.mean_temperature_f) > 60

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'zip_code'], 'weather': ['mean_temperature_f', 'zip_code'] }

TABLE trip ( trip.id (INTEGER), trip.zip_code (INTEGER), ) TABLE weather ( weather.mean_temperature_f (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

For each zip code, return how many times max wind speed reached 25?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT zip_code , count(*) FROM weather WHERE max_wind_Speed_mph >= 25 GROUP BY zip_code

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['max_wind_speed_mph', 'zip_code'] }

TABLE weather ( weather.max_wind_Speed_mph (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

For each zip code, how many times has the maximum wind speed reached 25 mph?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT zip_code , count(*) FROM weather WHERE max_wind_Speed_mph >= 25 GROUP BY zip_code

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['max_wind_speed_mph', 'zip_code'] }

TABLE weather ( weather.max_wind_Speed_mph (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

On which day and in which zip code was the min dew point lower than any day in zip code 94107?

extra

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT date , zip_code FROM weather WHERE min_dew_point_f < (SELECT min(min_dew_point_f) FROM weather WHERE zip_code = 94107)

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['date', 'min_dew_point_f', 'zip_code'] }

TABLE weather ( weather.date (TEXT), weather.min_dew_point_f (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

Which days had a minimum dew point smaller than any day in zip code 94107, and in which zip codes were those measurements taken?

extra

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT date , zip_code FROM weather WHERE min_dew_point_f < (SELECT min(min_dew_point_f) FROM weather WHERE zip_code = 94107)

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['date', 'min_dew_point_f', 'zip_code'] }

TABLE weather ( weather.date (TEXT), weather.min_dew_point_f (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

For each trip, return its ending station's installation date.

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT trip.id , station.installation_date FROM trip JOIN station ON trip.end_station_id = station.id

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'end_station_id'], 'station': ['id', 'installation_date'] }

TABLE station ( station.id (INTEGER), station.installation_date (TEXT), ) TABLE trip ( trip.id (INTEGER), trip.end_station_id (INTEGER), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

What is the installation date for each ending station on all the trips?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT trip.id , station.installation_date FROM trip JOIN station ON trip.end_station_id = station.id

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'end_station_id'], 'station': ['id', 'installation_date'] }

TABLE station ( station.id (INTEGER), station.installation_date (TEXT), ) TABLE trip ( trip.id (INTEGER), trip.end_station_id (INTEGER), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

Which trip started from the station with the largest dock count? Give me the trip id.

hard

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT trip.id FROM trip JOIN station ON trip.start_station_id = station.id ORDER BY station.dock_count DESC LIMIT 1

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'start_station_id'], 'station': ['id', 'dock_count'] }

TABLE station ( station.id (INTEGER), station.dock_count (INTEGER), ) TABLE trip ( trip.id (INTEGER), trip.start_station_id (INTEGER), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

What is the id of the trip that started from the station with the highest dock count?

hard

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT trip.id FROM trip JOIN station ON trip.start_station_id = station.id ORDER BY station.dock_count DESC LIMIT 1

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'start_station_id'], 'station': ['id', 'dock_count'] }

TABLE station ( station.id (INTEGER), station.dock_count (INTEGER), ) TABLE trip ( trip.id (INTEGER), trip.start_station_id (INTEGER), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

Count the number of trips that did not end in San Francisco city.

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT count(*) FROM trip JOIN station ON trip.end_station_id = station.id WHERE station.city != "San Francisco"

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'end_station_id'], 'station': ['id', 'city'] }

TABLE station ( station.id (INTEGER), station.city (TEXT), ) TABLE trip ( trip.id (INTEGER), trip.end_station_id (INTEGER), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

How many trips did not end in San Francisco?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT count(*) FROM trip JOIN station ON trip.end_station_id = station.id WHERE station.city != "San Francisco"

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'end_station_id'], 'station': ['id', 'city'] }

TABLE station ( station.id (INTEGER), station.city (TEXT), ) TABLE trip ( trip.id (INTEGER), trip.end_station_id (INTEGER), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

In zip code 94107, on which day neither Fog nor Rain was not observed?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT date FROM weather WHERE zip_code = 94107 AND EVENTS != "Fog" AND EVENTS != "Rain"

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['date', 'events', 'zip_code'] }

TABLE weather ( weather.date (TEXT), weather.events (TEXT), weather.zip_code (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

On which day has it neither been foggy nor rained in the zip code of 94107?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT date FROM weather WHERE zip_code = 94107 AND EVENTS != "Fog" AND EVENTS != "Rain"

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['date', 'events', 'zip_code'] }

TABLE weather ( weather.date (TEXT), weather.events (TEXT), weather.zip_code (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

What are the ids of stations that have latitude above 37.4 and never had bike availability below 7?

hard

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT id FROM station WHERE lat > 37.4 EXCEPT SELECT station_id FROM status GROUP BY station_id HAVING min(bikes_available) < 7

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'lat'], 'status': ['station_id', 'bikes_available'] }

TABLE station ( station.id (INTEGER), station.lat (NUMERIC), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), ) Possible JOINs: status.station_id = station.id

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Possible JOINs: status.station_id = station.id

bike_1

What are the ids of all stations that have a latitude above 37.4 and have never had less than 7 bikes available?

hard

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT id FROM station WHERE lat > 37.4 EXCEPT SELECT station_id FROM status GROUP BY station_id HAVING min(bikes_available) < 7

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'lat'], 'status': ['station_id', 'bikes_available'] }

TABLE station ( station.id (INTEGER), station.lat (NUMERIC), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), ) Possible JOINs: status.station_id = station.id

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Possible JOINs: status.station_id = station.id

bike_1

What are names of stations that have average bike availability above 10 and are not located in San Jose city?

extra

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT station.name FROM station JOIN status ON station.id = status.station_id GROUP BY status.station_id HAVING avg(bikes_available) > 10 EXCEPT SELECT name FROM station WHERE city = "San Jose"

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'name', 'city'], 'status': ['station_id', 'bikes_available'] }

TABLE station ( station.id (INTEGER), station.name (TEXT), station.city (TEXT), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), ) Possible JOINs: status.station_id = station.id

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Possible JOINs: status.station_id = station.id

bike_1

What are the names of all stations that have more than 10 bikes available and are not located in San Jose?

extra

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT station.name FROM station JOIN status ON station.id = status.station_id GROUP BY status.station_id HAVING avg(bikes_available) > 10 EXCEPT SELECT name FROM station WHERE city = "San Jose"

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'name', 'city'], 'status': ['station_id', 'bikes_available'] }

TABLE station ( station.id (INTEGER), station.name (TEXT), station.city (TEXT), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), ) Possible JOINs: status.station_id = station.id

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Possible JOINs: status.station_id = station.id

bike_1

What are the name, latitude, and city of the station with the lowest latitude?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT name , lat , city FROM station ORDER BY lat LIMIT 1

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'name', 'lat', 'city'] }

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.city (TEXT), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Possible JOINs:

bike_1

What is the name, latitude, and city of the station that is located the furthest South?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT name , lat , city FROM station ORDER BY lat LIMIT 1

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'name', 'lat', 'city'] }

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.city (TEXT), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Possible JOINs:

bike_1

What are the date, mean temperature and mean humidity for the top 3 days with the largest max gust speeds?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT date , mean_temperature_f , mean_humidity FROM weather ORDER BY max_gust_speed_mph DESC LIMIT 3

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['date', 'mean_temperature_f', 'mean_humidity', 'max_gust_speed_mph'] }

TABLE weather ( weather.date (TEXT), weather.mean_temperature_f (INTEGER), weather.mean_humidity (INTEGER), weather.max_gust_speed_mph (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

What is the date, average temperature and mean humidity for the days with the 3 largest maximum gust speeds?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT date , mean_temperature_f , mean_humidity FROM weather ORDER BY max_gust_speed_mph DESC LIMIT 3

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['date', 'mean_temperature_f', 'mean_humidity', 'max_gust_speed_mph'] }

TABLE weather ( weather.date (TEXT), weather.mean_temperature_f (INTEGER), weather.mean_humidity (INTEGER), weather.max_gust_speed_mph (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

List the name and the number of stations for all the cities that have at least 15 stations.

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT city , COUNT(*) FROM station GROUP BY city HAVING COUNT(*) >= 15

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'city'] }

TABLE station ( station.id (INTEGER), station.city (TEXT), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Possible JOINs:

bike_1

What is the name of every city that has at least 15 stations and how many stations does it have?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT city , COUNT(*) FROM station GROUP BY city HAVING COUNT(*) >= 15

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'city'] }

TABLE station ( station.id (INTEGER), station.city (TEXT), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Possible JOINs:

bike_1

Find the ids and names of stations from which at least 200 trips started.

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT start_station_id , start_station_name FROM trip GROUP BY start_station_name HAVING COUNT(*) >= 200

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'start_station_name', 'start_station_id'] }

TABLE trip ( trip.id (INTEGER), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), ) Possible JOINs:

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

What are the ids and names of all start stations that were the beginning of at least 200 trips?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT start_station_id , start_station_name FROM trip GROUP BY start_station_name HAVING COUNT(*) >= 200

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'start_station_name', 'start_station_id'] }

TABLE trip ( trip.id (INTEGER), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), ) Possible JOINs:

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

Find the zip code in which the average mean visibility is lower than 10.

easy

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT zip_code FROM weather GROUP BY zip_code HAVING avg(mean_visibility_miles) < 10

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['mean_visibility_miles', 'zip_code'] }

TABLE weather ( weather.mean_visibility_miles (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

For each zip code, select all those that have an average mean visiblity below 10.

easy

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT zip_code FROM weather GROUP BY zip_code HAVING avg(mean_visibility_miles) < 10

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['mean_visibility_miles', 'zip_code'] }

TABLE weather ( weather.mean_visibility_miles (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

List all the cities in a decreasing order of each city's stations' highest latitude.

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT city FROM station GROUP BY city ORDER BY max(lat) DESC

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'lat', 'city'] }

TABLE station ( station.id (INTEGER), station.lat (NUMERIC), station.city (TEXT), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Possible JOINs:

bike_1

For each city, list their names in decreasing order by their highest station latitude.

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT city FROM station GROUP BY city ORDER BY max(lat) DESC

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'lat', 'city'] }

TABLE station ( station.id (INTEGER), station.lat (NUMERIC), station.city (TEXT), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Possible JOINs:

bike_1

What are the dates that had the top 5 cloud cover rates? Also tell me the cloud cover rate.

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT date , cloud_cover FROM weather ORDER BY cloud_cover DESC LIMIT 5

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['date', 'cloud_cover'] }

TABLE weather ( weather.date (TEXT), weather.cloud_cover (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

What are the dates that have the 5 highest cloud cover rates and what are the rates?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT date , cloud_cover FROM weather ORDER BY cloud_cover DESC LIMIT 5

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['date', 'cloud_cover'] }

TABLE weather ( weather.date (TEXT), weather.cloud_cover (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

What are the ids and durations of the trips with the top 3 durations?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT id , duration FROM trip ORDER BY duration DESC LIMIT 3

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'duration'] }

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), ) Possible JOINs:

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

What are the ids of the trips that lasted the longest and how long did they last?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT id , duration FROM trip ORDER BY duration DESC LIMIT 3

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'duration'] }

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), ) Possible JOINs:

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

For each station, return its longitude and the average duration of trips that started from the station.

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT station.name , station.long , avg(trip.duration) FROM station JOIN trip ON station.id = trip.start_station_id GROUP BY trip.start_station_id

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'name', 'long'], 'trip': ['id', 'duration', 'start_station_id'] }

TABLE station ( station.id (INTEGER), station.name (TEXT), station.long (NUMERIC), ) TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_station_id (INTEGER), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

For each start station id, what is its name, longitude and average duration of trips started there?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT station.name , station.long , avg(trip.duration) FROM station JOIN trip ON station.id = trip.start_station_id GROUP BY trip.start_station_id

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'name', 'long'], 'trip': ['id', 'duration', 'start_station_id'] }

TABLE station ( station.id (INTEGER), station.name (TEXT), station.long (NUMERIC), ) TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_station_id (INTEGER), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

For each station, find its latitude and the minimum duration of trips that ended at the station.

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT station.name , station.lat , min(trip.duration) FROM station JOIN trip ON station.id = trip.end_station_id GROUP BY trip.end_station_id

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'name', 'lat'], 'trip': ['id', 'duration', 'end_station_id'] }

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), ) TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.end_station_id (INTEGER), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

For each end station id, what is its name, latitude, and minimum duration for trips ended there?

medium

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT station.name , station.lat , min(trip.duration) FROM station JOIN trip ON station.id = trip.end_station_id GROUP BY trip.end_station_id

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'station': ['id', 'name', 'lat'], 'trip': ['id', 'duration', 'end_station_id'] }

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), ) TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.end_station_id (INTEGER), ) Possible JOINs:

TABLE station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

List all the distinct stations from which a trip of duration below 100 started.

easy

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT DISTINCT start_station_name FROM trip WHERE duration < 100

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'duration', 'start_station_name'] }

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_station_name (TEXT), ) Possible JOINs:

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

What are all the different start station names for a trip that lasted less than 100?

easy

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT DISTINCT start_station_name FROM trip WHERE duration < 100

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'duration', 'start_station_name'] }

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_station_name (TEXT), ) Possible JOINs:

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

Find all the zip codes in which the max dew point have never reached 70.

hard

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT DISTINCT zip_code FROM weather EXCEPT SELECT DISTINCT zip_code FROM weather WHERE max_dew_point_f >= 70

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['max_dew_point_f', 'zip_code'] }

TABLE weather ( weather.max_dew_point_f (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

What are all the different zip codes that have a maximum dew point that was always below 70?

hard

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT DISTINCT zip_code FROM weather EXCEPT SELECT DISTINCT zip_code FROM weather WHERE max_dew_point_f >= 70

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['max_dew_point_f', 'zip_code'] }

TABLE weather ( weather.max_dew_point_f (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs:

bike_1

Find the id for the trips that lasted at least as long as the average duration of trips in zip code 94103.

hard

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT id FROM trip WHERE duration >= (SELECT avg(duration) FROM trip WHERE zip_code = 94103)

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'duration', 'zip_code'] }

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.zip_code (INTEGER), ) Possible JOINs:

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

What are the ids of all trips that had a duration as long as the average trip duration in the zip code 94103?

hard

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT id FROM trip WHERE duration >= (SELECT avg(duration) FROM trip WHERE zip_code = 94103)

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'trip': ['id', 'duration', 'zip_code'] }

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.zip_code (INTEGER), ) Possible JOINs:

TABLE trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Possible JOINs:

bike_1

What are the dates in which the mean sea level pressure was between 30.3 and 31?

easy

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

SELECT date FROM weather WHERE mean_sea_level_pressure_inches BETWEEN 30.3 AND 31

Table station ( station.id (INTEGER), station.name (TEXT), station.lat (NUMERIC), station.long (NUMERIC), station.dock_count (INTEGER), station.city (TEXT), station.installation_date (TEXT), ) Table status ( status.station_id (INTEGER), status.bikes_available (INTEGER), status.docks_available (INTEGER), status.time (TEXT), ) Table trip ( trip.id (INTEGER), trip.duration (INTEGER), trip.start_date (TEXT), trip.start_station_name (TEXT), trip.start_station_id (INTEGER), trip.end_date (TEXT), trip.end_station_name (TEXT), trip.end_station_id (INTEGER), trip.bike_id (INTEGER), trip.subscription_type (TEXT), trip.zip_code (INTEGER), ) Table weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: status.station_id = station.id

{ 'station': ['id', 'name', 'lat', 'long', 'dock_count', 'city', 'installation_date'], 'status': ['station_id', 'bikes_available', 'docks_available', 'time'], 'trip': ['id', 'duration', 'start_date', 'start_station_name', 'start_station_id', 'end_date', 'end_station_name', 'end_station_id', 'bike_id', 'subscription_type', 'zip_code'], 'weather': ['date', 'max_temperature_f', 'mean_temperature_f', 'min_temperature_f', 'max_dew_point_f', 'mean_dew_point_f', 'min_dew_point_f', 'max_humidity', 'mean_humidity', 'min_humidity', 'max_sea_level_pressure_inches', 'mean_sea_level_pressure_inches', 'min_sea_level_pressure_inches', 'max_visibility_miles', 'mean_visibility_miles', 'min_visibility_miles', 'max_wind_speed_mph', 'mean_wind_speed_mph', 'max_gust_speed_mph', 'precipitation_inches', 'cloud_cover', 'events', 'wind_dir_degrees', 'zip_code'] }

{ 'weather': ['date', 'mean_sea_level_pressure_inches'] }

TABLE weather ( weather.date (TEXT), weather.mean_sea_level_pressure_inches (NUMERIC), ) Possible JOINs:

TABLE weather ( weather.date (TEXT), weather.max_temperature_f (INTEGER), weather.mean_temperature_f (INTEGER), weather.min_temperature_f (INTEGER), weather.max_dew_point_f (INTEGER), weather.mean_dew_point_f (INTEGER), weather.min_dew_point_f (INTEGER), weather.max_humidity (INTEGER), weather.mean_humidity (INTEGER), weather.min_humidity (INTEGER), weather.max_sea_level_pressure_inches (NUMERIC), weather.mean_sea_level_pressure_inches (NUMERIC), weather.min_sea_level_pressure_inches (NUMERIC), weather.max_visibility_miles (INTEGER), weather.mean_visibility_miles (INTEGER), weather.min_visibility_miles (INTEGER), weather.max_wind_Speed_mph (INTEGER), weather.mean_wind_speed_mph (INTEGER), weather.max_gust_speed_mph (INTEGER), weather.precipitation_inches (INTEGER), weather.cloud_cover (INTEGER), weather.events (TEXT), weather.wind_dir_degrees (INTEGER), weather.zip_code (INTEGER), ) Possible JOINs: