What are the titles and directors of the films were never presented in China?
create table film (title varchar, director varchar, film_id varchar, country varchar, PRIMARY KEY (title)); create table market (market_id varchar, PRIMARY KEY (market_id)); create table film_market_estimation (market_id varchar, PRIMARY KEY (market_id))
select title, director from film where not film_id in (select film_id from film_market_estimation as t1 join market as t2 on t1.market_id = t2.market_id where country = 'china')