Oracle-L: ROWID question?

From: Denham Eva <EvaD_at_TFMC.co.za>
Date: Tue, 22 Oct 2002 06:49:13 -0800
Message-ID: <F001.004EFC94.20021022064913@fatcity.com>

Hello Gurus

Does Oracle reuse ROWID "numbers", once a delete of a row has been done?

The reason I ask is because, I need to delete duplicate records from a very large table.
However I must keep the newest date in one of the date columns.

If oracle does not reuse the ROWID this would be very simple. Here is my sql:

DELETE FROM tablename a
WHERE ROWID <> (SELECT MAX(ROWID)

			FROM tablename b
			WHERE a.col1 = b.col1
			AND a.col2 = b.col2
			AND a.col3 = b.col3);

However if Oracle does reuse ROWID's then I have a serious sql problem :) All the examples I have of deleteing duplicates use the ROWID. If anyone has a suggestion on how else to do this I would be most grateful.

Otherwise answer on my main question would be fine. Many Thanks
Denham Eva

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Author: Denham Eva
INET: EvaD_at_TFMC.co.za

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