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 kelvinvockins
kelvinvockins
6,906 Points

Reporting with sql, 2nd code challenge COUNT BY GROUP incorrect code

In the library database there's a books table. There are id, title, author, genre and first_published columns.

Write a query to count all the unique genres in the books table. Alias it as total_genres.

SELECT COUNT(DISTINCT(genre)) AS total_genre FROM books GROUP BY genre;

2 Answers

KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,972 Points

The alias is total_genres. Also to get a total count of all genres you wouldn't group them.

kelvinvockins
kelvinvockins
6,906 Points
kelvinvockins
kelvinvockins
6,906 Points

thanks