On 01/14/2011 03:17 PM, Nikolas Everett wrote:
> SELECT *
> FROM request
> JOIN (SELECT a, MAX(b) as b FROM test GROUP BY a) max USING (a)
> JOIN test USING (a, b);
This actually looks like a perfect candidate for DISTINCT ON.
SELECT DISTINCT ON (a, b) a, b, revision
FROM test
ORDER BY a, b DESC;
Maybe I'm just misunderstanding your situation, though.
--
Shaun Thomas
OptionsHouse | 141 W. Jackson Blvd. | Suite 800 | Chicago IL, 60604
312-676-8870
sthomas@peak6.com
______________________________________________
See http://www.peak6.com/email_disclaimer.php
for terms and conditions related to this email