Which film actors and actresses played a role in more than 30 films? List their first and last names.
SELECT T2.first_name , T2.last_name FROM film_actor AS T1 JOIN actor AS T2 ON T1.actor_id  =  T2.actor_id GROUP BY T2.actor_id HAVING count ( * )  > 30
actors and actresses played in more than 30 films refers to HAVING COUNT(*) > 30; list their first and last names refers to SELECT first_name, last_name;