Comments on: How to find the max row per group in SQL without subqueries

By: David Kleszyk

David Kleszyk — Sat, 14 Jan 2012 21:03:43 +0000

Stumbled on this after being stymied by MySQL 3.23′s lack of sub-queries. Extremely helpful, thanks so much!

By: Thomas

Thomas — Thu, 09 Jun 2011 21:09:44 +0000

As a followup, because it took me a few minutes before the facepalm. If you wanted the youngest, coolest kid, because you have multiple kids of the same age (assuming a coolness column), you’d change the join to:

left outer join person as younger on younger.gender = young.gender
and (younger.age young.coolness))

By: Anonymous

Anonymous — Tue, 21 Dec 2010 19:38:32 +0000

Thank you so much for this post. The solution I was using with subqueries was horribly inefficient but this did the trick. As you said, it’s surprisingly fast too.

By: Ali desitero

Ali desitero — Tue, 07 Dec 2010 13:31:21 +0000

PERFECT!

After spending hours and hours and trying many many different queries, this solution work perfect for me.

very fast on a standart pc with 30.000 rows. Only 0.0399 secs.

Good job!

By: arun

arun — Thu, 02 Sep 2010 16:51:36 +0000

the last query and its output do not match … the last age column in output should not be there