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Databases Reporting with SQL Aggregate and Numeric Functions Practice Session

Sean Flanagan
Sean Flanagan
33,233 Points

Challenge 3 - Movie Average Rating

Hi. I'm having a problem with this challenge.

"-- Calculate the average rating for each movie and round it to one decimal place"

Here's my attempt:

SELECT ROUND(0, 1) AVG(rating) FROM reviews;

Output:

Error: near "(": syntax error

I would appreciate any feedback please.

2 Answers

Sean Flanagan
Sean Flanagan
33,233 Points

That worked. Thanks Dale. I've given your solution an up vote and Best Answer.

Philip Schultz
Philip Schultz
11,413 Points

I don't this would get you the average rating for each movie, right? Wouldn't this make more sense?

SELECT movie_id, ROUND(AVG(rating), 1) FROM reviews GROUP BY movie_id;

Hey Dale, by any chance would you know why I am getting "error title does not exist" when I do.

SELECT title, ROUND(AVG(rating), 1) AS average FROM reviews GROUP BY title;

?