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CREATE TABLE tags (`userId` int, `movieId` int, `tag` varchar(6)) ; INSERT INTO tags (`userId`, `movieId`, `tag`) VALUES (1, 1, 'crime'), (1, 2, 'dark'), (1, 2, 'dark'), (2, 2, 'greed'), (2, 2, 'dark'), (3, 3, 'music'), (3, 3, 'dance'), (3, 3, 'quirky'), (4, 3, 'dance'), (4, 3, 'quirky') ;
SELECT movieId, MIN(count_tag) AS Min_Tag, MAX(count_tag) AS Max_Tag, AVG(count_tag) AS Avg_Tag FROM (SELECT movieId,tag, count(*) count_tag FROM tags GROUP BY movieId, tag) non_dup GROUP BY movieId
movieId
Min_Tag
Max_Tag
Avg_Tag
1
1
1
1.0000
2
1
3
2.0000
3
1
2
1.6667