human
Schema:
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)
Please answer with SQL.
assistant
Sure, I understand.
human
What are the names of stations that are located in Palo Alto city but have never been the ending point of trips more than 100 times?
assistant
SELECT name FROM station WHERE city = 'Palo Alto' EXCEPT SELECT end_station_name FROM trip GROUP BY end_station_name HAVING count(*) > 100
human
What is the average latitude and longitude of stations located in San Jose city?
assistant
SELECT avg(lat) , avg(long) FROM station WHERE city = 'San Jose'
human
What are the name, latitude, and city of the station with the lowest latitude?
assistant
SELECT name , lat , city FROM station ORDER BY lat LIMIT 1
human
For each city, return the highest latitude among its stations.
assistant
SELECT city , max(lat) FROM station GROUP BY city
human
List the name and the number of stations for all the cities that have at least 15 stations.
assistant
SELECT city , COUNT(*) FROM station GROUP BY city HAVING COUNT(*) >= 15
human
What is the number of distinct cities the stations are located at?
assistant
SELECT COUNT( DISTINCT city ) FROM station ;