CREATE TABLE film (film_id NUMBER, title CLOB, studio CLOB, director CLOB, gross_in_dollar NUMBER)
CREATE TABLE market (market_id NUMBER, country CLOB, number_cities NUMBER)
CREATE TABLE film_market_estimation (estimation_id NUMBER, low_estimate NUMBER, high_estimate NUMBER, film_id NUMBER, type CLOB, market_id NUMBER, year NUMBER)

Return the maximum and minimum number of cities across all markets.
SELECT MAX(number_cities), MIN(number_cities) FROM market
SELECT MAX("number_cities"), MIN("number_cities") FROM "market"