CREATE TABLE schedule (cinema_id NUMBER, film_id NUMBER, date CLOB, show_times_per_day NUMBER, price NUMBER)
CREATE TABLE cinema (cinema_id NUMBER, name CLOB, openning_year NUMBER, capacity NUMBER, location CLOB)
CREATE TABLE film (film_id NUMBER, rank_in_series NUMBER, number_in_season NUMBER, title CLOB, directed_by CLOB, original_air_date CLOB, production_code CLOB)

What are all the locations with a cinema?
SELECT DISTINCT location FROM cinema
SELECT DISTINCT "location" FROM "cinema"