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@xxxxxxxxx ______________________________________________ See http://www.peak6.com/email_disclaimer.php for terms and conditions related to this email -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
