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

Show names of actors that have appeared in musical with name 'The Phantom of the Opera'.
SELECT T1.name FROM actor AS T1 JOIN musical AS T2 ON T1.musical_id = T2.musical_id WHERE T2.name = "The Phantom of the Opera"
SELECT "T1"."name" FROM "actor" AS "T1" JOIN "musical" AS "T2" ON "T1"."musical_id" = "T2"."musical_id" AND "T2"."name" = "The Phantom of the Opera"