CREATE TABLE Reviewer (rID INT, name TEXT)
CREATE TABLE Rating (rID INT, mID INT, stars INT, ratingDate DATE)
CREATE TABLE Movie (mID INT, title TEXT, year INT, director TEXT)

Find the average rating star for each movie that received at least 2 ratings.
SELECT mID, AVG(stars) FROM Rating GROUP BY mID
SELECT "mID", AVG("stars") FROM "Rating" GROUP BY "mID"