CREATE TABLE musical (musical_id NUMBER, name CLOB, year NUMBER, award CLOB, category CLOB, nominee CLOB, result CLOB)
CREATE TABLE actor (actor_id NUMBER, name CLOB, musical_id NUMBER, character CLOB, duration CLOB, age NUMBER)

What are the names of actors who are not 20 years old?
SELECT name FROM actor WHERE age <> 20
SELECT "name" FROM "actor" WHERE "age" <> 20