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
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sthomas(at)peak6(dot)com
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