CREATE TABLE train_station (train_id NUMBER, station_id NUMBER)
CREATE TABLE train (train_id NUMBER, name CLOB, time CLOB, service CLOB)
CREATE TABLE station (station_id NUMBER, name CLOB, annual_entry_exit NUMBER, annual_interchanges NUMBER, total_passengers NUMBER, location CLOB, main_services CLOB, number_of_platforms NUMBER)

Show all locations that have train stations with at least 15 platforms and train stations with more than 25 total passengers.
SELECT DISTINCT location FROM station WHERE number_of_platforms >= 15 AND total_passengers > 25
SELECT DISTINCT "location" FROM "station" WHERE "number_of_platforms" >= 15 AND "total_passengers" > 25