CREATE TABLE weekly_weather (station_id NUMBER, day_of_week CLOB, high_temperature NUMBER, low_temperature NUMBER, precipitation NUMBER, wind_speed_mph NUMBER)
CREATE TABLE route (train_id NUMBER, station_id NUMBER)
CREATE TABLE station (id NUMBER, network_name CLOB, services CLOB, local_authority CLOB)
CREATE TABLE train (id NUMBER, train_number NUMBER, name CLOB, origin CLOB, destination CLOB, time CLOB, interval CLOB)

Find the origins from which more than 1 train starts.
SELECT origin FROM train GROUP BY origin HAVING COUNT(*) > 1
SELECT "origin" FROM "train" GROUP BY "origin" HAVING COUNT(*) > 1