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Databases

Grabbing a count of genres in a library table

Hello,

Im working on this challenge:

https://teamtreehouse.com/library/reporting-with-sql/aggregate-and-numeric-functions/counting-groups

here is my query:

select distinct count(genre) as total_genres from books;

The error is "Your query does not have the right count".

Whats wrong with my query?

2 Answers

Steven Parker
Steven Parker
229,005 Points

You have "distinct" in the wrong place.

A single aggregate field is always distinct, so it doesn't do anything in front of count. But it would make a difference in the count itself if you put it inside the count function.

Thanks, worked fine and im on to the next step!