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Adam Duffield
Adam Duffield
30,494 Points
Posted by Adam Duffield
Adam Duffield
30,494 Points

Grouping, Joining & Cleaning Up Task 3/3 help?

Hi, Having issues with this code challege, i've checked several other posts about this same challenge but none seem to give me a successful answer. The challenge is:

Like before, select the average "score" as "average", setting to 0 if null, by grouping the "movie_id" from the "reviews" table. Also, do an outer join on the "movies" table with its "id" column and display the movie "title" before the "average". Finally, filter out any "average" score over 2.

my code is:

SELECT title, AVG(score) AS average, IFNULL(AVG(score),0) AS average FROM reviews RIGHT OUTER JOIN movies ON movies.id = reviews.movie_id GROUP BY movie_id HAVING average < 2;

The URL for the challenge is:

http://teamtreehouse.com/library/grouping-joining-and-cleaning-up

Any ideas to pass this challenge?

Adam

1 Answer

Jeff Busch
Jeff Busch
19,287 Points

Hi Adam,

You're close.

SELECT title, IFNULL(AVG(score),0) AS average FROM movies LEFT OUTER JOIN reviews ON movies.id = reviews.movie_id GROUP BY movie_id HAVING average <= 2;