"Carlo Stonebanks" <stonec.regis...@sympatico.ca> wrote: > SELECT * > FROM mdx_core.vw_provider AS p > WHERE provider_id IN (SELECT 13083101) > > I am using the simple IN (SELECT n) in QUERY 2 to simplify the > problem. I noticed the oddity of the behaviour when I used a > proper "IN (SELECT myId FROM myTable)" Did you try?: SELECT * FROM mdx_core.vw_provider AS p WHERE EXISTS (SELECT * FROM myTable WHERE myId = provider_id) For any follow-up you should probably mention what version of PostgreSQL this is and how it's configured. http://wiki.postgresql.org/wiki/SlowQueryQuestions -Kevin
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