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)
CREATE TABLE train (train_id NUMBER, name CLOB, time CLOB, service CLOB)
CREATE TABLE train_station (train_id NUMBER, station_id NUMBER)

Show the names and main services for train stations that have the top three total number of passengers.
SELECT name, main_services FROM station ORDER BY total_passengers DESC LIMIT 3
SELECT "name", "main_services" FROM "station" ORDER BY "total_passengers" DESC FETCH FIRST 3 ROWS ONLY