Oracle-L: RE: Delete query

From: Vadim Gorbounov <vgorbounov_at_724.com>
Date: Tue, 09 Jul 2002 10:03:36 -0800
Message-ID: <F001.00492959.20020709100336@fatcity.com>

To avoid aggregates you can :

delete from table t where not exists (select null from table x where t.USER_ID=x.USER_ID and t.CREATED > x.CREATED);

it seems to run faster given the USER_ID and CREATED are indexed

-----Original Message-----
Sent: Tuesday, July 09, 2002 1:00 PM
To: Multiple recipients of list ORACLE-L

Hi,

Can anyone help me with this delete statement?

I have the following table:

 Name                                      Null?    Type
 ----------------------------------------- -------- -------------
 USER_ID                                   NOT NULL NUMBER(15)
 PASSWORD                                           VARCHAR2(30)
 CREATED                                            DATE

What I need to do is delete the oldest record for a particular user_id. And its doing my head in. Any help appreciated!

Thanks,
Steve.

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Author: Steven Hovington
INET: steven.hovington_at_procession.com

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Author: Vadim Gorbounov
INET: vgorbounov_at_724.com

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