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Delete with IN and EXISTS

652108Aug 12 2008 — edited Aug 12 2008
Hi,
I was suggested by one of the oracle forums member
that

DELETE FROM PYMT_DTL WHERE CLM_CASE_NO IN
(SELECT CLM_CASE_NO FROM TEMP_ARCHIVE1 );

is same as

DELETE FROM PYMT_DTL WHERE EXISTS (SELECT CLM_CASE_NO FROM TEMP_ARCHIVE1);


I see rows only get deleted with 2nd query


if both queries are same why is not 1st query deleteing rows ?

Thanks in Advance
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Locked on Sep 9 2008
Added on Aug 12 2008
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