Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Databases

Rania Mohamed
PLUS
Rania Mohamed
Courses Plus Student 1,333 Points
Posted by Rania Mohamed
Rania Mohamed
Courses Plus Student 1,333 Points

reporting wit SQL, challenge Task giving error

Challenge Task 1 of 1

We're in a movie database. There's a reviews table with the columns of id, movie_id, username, review and rating. The movie "Starman" has the id of 6. Movie ids are found in the movie_id column in the reviews table. Write a query that totals up all ratings in the reviews table. Alias it as starman_total_ratings. Type in your command below. Bummer! Your query didn't perform the correct sum calculation. Get Help Try Again

select movie_id, sum(rating) AS starman_total_ratings from reviews where movie_id = 6 GROUP BY movie_id;

the query shows the correct total of 10 , but still gives the Bummer message.

1 Answer

Steven Parker
Steven Parker
231,248 Points
Steven Parker
Steven Parker
231,248 Points

The challenge only asked for the total column.

You don't need movie_id. And while it doesn't hurt, you also don't need the GROUP BY clause since you are returning only the aggregate and have only one row.

SELECT SUM(rating) AS starman_total_ratings FROM reviews WHERE movie_id = 6;