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Development Tools Database Foundations SQL Calculating, Aggregating and Other Functions Grouping, Joining and Cleaning Up

Posted by efi domb
efi domb
9,569 Points

Grouping, Joining and Cleaning Up

the task (3 of 3) 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, include averages under 2.

what is wrong with my code?

efi domb
efi domb
9,569 Points

my answer was:

select title ifnull(avg(score),0) as avarage from reviews right outer join movies on reviews.movie_id = movies.id group by movie_id having average < 2;

1 Answer

Chris Shearon
Chris Shearon
Courses Plus Student 17,330 Points

I see there's a comma missing after title and average is misspelled after the as. The challenge machine is very picky sometimes like that.

Try this

select title, ifnull(avg(score),0) as average from reviews right outer join movies on reviews.movie_id = movies.id group by movie_id having average < 2;