RE: Do you ever have days where you dont want to think ?

• "Kirsh, Gary" <gary.kirsh_at_gs.com>

> It's not using the index because of the NOT IN - it doesn't help to search
> an index to see what's NOT in it. Did you try rewriting it to use a NOT
> EXISTS instead?

Which can quickly degenerate into a tablescan also... even if the index exists if the entropy isn't high enough oracle will skip it anyway. Try an analyze table first on the exists (or a sub-query) and see how that works.

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Steven Lembark                               2930 W. Palmer
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Author: Steven Lembark
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