Oracle-L: Re:Delete query

From: <dgoulet_at_vicr.com>
Date: Tue, 09 Jul 2002 09:53:44 -0800
Message-ID: <F001.00492923.20020709095344@fatcity.com>

Steve,

I've seen three replies all of which are mostly right. Their problem is that if a user has one and only one row you'll get that one too which will leave you with a table of only those who had multiple rows in the first place. Darn, I hate that too. Try this instead:

delete from <table> a
where created = (select min(created)

                 from <table> b
                 where b.user_id = a.user_id)
  and created != (select max(created)
                  from <table> c
                  where c.user_id = a.user_id);

Dick Goulet

____________________Reply Separator____________________
Author: "Steven Hovington" <steven.hovington_at_procession.com>
Date:       7/9/2002 8:59 AM

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:
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