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Home -> Community -> Mailing Lists -> Oracle-L -> Re: ROWID question?
Hi,
Space is reused therefore ROWID are reused. You can certainly modify your delete duplicate routine for special cases to include record must have max date.
Rick
Denham Eva
<EvaD_at_TFMC.co. To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
za> cc:
Sent by: Subject: ROWID question?
root_at_fatcity.c
om
10/22/2002
10:49 AM
Please respond
to ORACLE-L
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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