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 Reporting with SQL Aggregate and Numeric Functions Summing Values

Shahrukh Siddiqui
Shahrukh Siddiqui
2,698 Points
Posted by Shahrukh Siddiqui
Shahrukh Siddiqui
2,698 Points

UNABLE TO WRITE THE QUERY

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 for the movie "Starman" in the reviews table. Alias it as starman_total_ratings.

1 Answer

KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,971 Points
KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,971 Points

It's kind of confusing because there is an id column and the challenge refers to "movie has the id" when it would have been more clear to state movie_id. The syntax you will want to use is:

SELECT SUM(column_name) as alias
FROM table_name
WHERE condition;

The where condition is WHERE movie_id = 6. Give the rest a try.