On Wed, 19 Jun 2002, Varun Kacholia wrote:
> 1. SELECT * FROM dbmedia WHERE ID IN ((SELECT id FROM wdmedia WHERE
> word = 'whatever') ) LIMIT 20;
You probably didn't know this, but postgres is notorious for being
*very* bad at optimizing IN queries. Try this instead:
SELECT * FROM dbmedia d WHERE EXISTS
(SELECT 1 FROM wdmedia w WHERE w.id = d.id AND word = 'whatever')
LIMIT 20;
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