For each movie that received more than 3 reviews, what is the average rating?
SELECT mID ,  avg(stars) FROM Rating GROUP BY mID HAVING count(*)  >=  2
SELECT mID ,  avg(stars) FROM Rating GROUP BY mID HAVING count(*)  >=  2
[{'mID': 101, 'avg(stars)': 3.0}, {'mID': 103, 'avg(stars)': 2.5}, {'mID': 104, 'avg(stars)': 2.5}, {'mID': 106, 'avg(stars)': 4.5}, {'mID': 107, 'avg(stars)': 4.0}, {'mID': 108, 'avg(stars)': 3.3333333333333335}]