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

Posted by jason chan
jason chan
31,009 Points

Count all the books in each genre. Include the genre column first and the genre_count as the second column of informatio

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

select genre, count(genre) as genre_count group by genre;

Not passing how do I do pass this one?

1 Answer

Tobias Helmrich
Tobias Helmrich
31,604 Points

Hey there Jason,

you have two problems in your statement: Firstly you forgot to use the FROM keyword with the table you want to select the data from (in this case it's called books). Secondly you have to count all the rows, not genre.

It should look like this in the end:

SELECT genre, count(*) AS genre_count FROM books GROUP BY genre;

I hope that helps! :)

jason chan
jason chan
31,009 Points

thanks man. I wish that question was phrased better.

Tobias Helmrich
Tobias Helmrich
31,604 Points

No problem, glad I could help! :)