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Finding Orphaned Records In Oracle Table

Posted on 2005-03-02
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I have three Oracle tables that share a common field.  Table A contains all records.  Tables B and C are index tables that contain a unique non-intersecting subset of records that together should equal all records in Tables A.  Table A however contains additional orphaned records that no longer are indexed in either Tables B and C.  How can I find the orphaned records in table A?
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Question by:Shaundinger
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jrb1 earned 2000 total points
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select * from tablea
where not exists
(Select 'x' from tableb where tablea.key = tableb.key)
and not exists
(select 'x' from tablec where tablea.key = tablec.key);
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