SQL Group By with an Order By

Question

I have a table of tags and want to get the highest count tags from the list.

Sample data looks like this

id (1) tag (\'night\')
id (2) tag (\'awesome         


        

Answer 1

MySQL prior to version 5 did not allow aggregate functions in ORDER BY clauses.

You can get around this limit with the deprecated syntax:

SELECT COUNT(id), `Tag` from `images-tags`
GROUP BY `Tag`
ORDER BY 1 DESC
LIMIT 20

1, since it's the first column you want to group on.