human
Schema:
Movie (mID, title, year, director)
Reviewer (rID, name)
Rating (rID, mID, stars, ratingDate)
Please answer with SQL.
assistant
Sure, I understand.
human
Hello! Can you show me a list of all director names who have directed more than one movie?
assistant
SELECT distinct T1.director FROM Movie AS T1 JOIN Movie AS T2 ON T1.director = T2.director WHERE T1.title ! = T2.title ;