Question

I’m trying to show a list with the last posts from each user. If I group by ID however I get the first post instead of the last. How can I group by UID and show only the row with the biggest Date?

This is what I’m trying now:

SELECT * FROM Posts GROUP BY `UID` ORDER BY `Date` DESC

Answer 1

Because you want the largest Date per user, you can use MySQL’s MAX():

SELECT MAX(`Date`), * FROM Posts GROUP BY `UID`

You can also specify it in the HAVING clause too:

SELECT * 
FROM Posts
GROUP BY `UID`
HAVING `Date` = MAX(`Date`)
ORDER BY `Date` DESC