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

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"