CREATE TABLE film_actor (actor_id VARCHAR)
CREATE TABLE actor (first_name VARCHAR, last_name VARCHAR, actor_id VARCHAR)

Which film actors (actresses) played a role in more than 30 films? List his or her first name and last name.
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
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