CREATE TABLE movie (mid DECIMAL, title TEXT, year DECIMAL, director TEXT)
CREATE TABLE reviewer (rid DECIMAL, name TEXT)
CREATE TABLE rating (rid DECIMAL, mid DECIMAL, stars DECIMAL, ratingdate TIME)

Find the movies with the highest average rating. Return the movie titles and average rating.
SELECT T2.title, AVG(T1.stars) FROM rating AS T1 JOIN movie AS T2 ON T1.mid = T2.mid GROUP BY T1.mid ORDER BY AVG(T1.stars) DESC LIMIT 1
SELECT "T2"."title", AVG("T1"."stars") FROM "rating" AS "T1" JOIN "movie" AS "T2" ON "T1"."mid" = "T2"."mid" GROUP BY "T1"."mid" ORDER BY AVG("T1"."stars") DESC NULLS LAST LIMIT 1