RE: SQL question
From: Powell, Mark <mark.powell2_at_hp.com>
Date: Wed, 24 Oct 2012 19:18:53 +0000
Message-ID: <1E24812FBE5611419EFAFC488D7CCDD112159493_at_G5W2734.americas.hpqcorp.net>
Any change there the difference in the two queries is just due to DML activity on the target tables?
Date: Wed, 24 Oct 2012 19:18:53 +0000
Message-ID: <1E24812FBE5611419EFAFC488D7CCDD112159493_at_G5W2734.americas.hpqcorp.net>
Any change there the difference in the two queries is just due to DML activity on the target tables?
-----Original Message-----
From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Ramadoss, Karthik
Sent: Wednesday, October 24, 2012 3:01 PM
To: oracle-l_at_freelists.org
Subject: SQL question
This is probably a simple one but definitely something new for me.
Database: 11.2.0.3
OS: Oracle Linux 5.6
A SQL like
SELECT A.COL1, A.COL2, B.COL3 FROM TABLE1 A, TABLE2 B, TABLE3 C WHERE A.ID = B.ID AND B.ID = C.ID
returns 1,192,940 rows.
And
SELECT COUNT(*) from (SELECT A.COL1, A.COL2, B.COL3 FROM TABLE1 A, TABLE2 B, TABLE3 C WHERE A.ID = B.ID AND B.ID = C.ID)
Returns 1,192,978 rows.
Anyone know what is going on here? I would expect both to return the same number of rows.
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Received on Wed Oct 24 2012 - 21:18:53 CEST