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 Counting Groups

Posted by Tafari Carnegie
Tafari Carnegie
2,679 Points

select genre,count(distinct genre) as total_genres from books group by genre

Hi this is for challenge Task 2 of 2 and its to count all the distinct genres, I been on this for weeks and I can't figure it out

1 Answer

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

The instructions ask you to "Write a query to count all the unique genres in the books table.", so you don't need a genre column or a GROUP BY:

select count(distinct genre) as total_genres from books;