Vadim, excellent answer. answers the question and the underlying intent, and takes into account performance.
jack --- Vadim Gorbounov <[EMAIL PROTECTED]> wrote: > 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. > > -- > Please see the official ORACLE-L FAQ: > http://www.orafaq.com > -- > Author: Steven Hovington > INET: [EMAIL PROTECTED] > > Fat City Network Services -- (858) 538-5051 FAX: > (858) 538-5051 > San Diego, California -- Public Internet > access / Mailing Lists > -------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an > E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of > 'ListGuru') and in > the message BODY, include a line containing: UNSUB > ORACLE-L > (or the name of mailing list you want to be removed > from). You may > also send the HELP command for other information > (like subscribing). > -- > Please see the official ORACLE-L FAQ: > http://www.orafaq.com > -- > Author: Vadim Gorbounov > INET: [EMAIL PROTECTED] > > Fat City Network Services -- (858) 538-5051 FAX: > (858) 538-5051 > San Diego, California -- Public Internet > access / Mailing Lists > -------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an > E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of > 'ListGuru') and in > the message BODY, include a line containing: UNSUB > ORACLE-L > (or the name of mailing list you want to be removed > from). You may > also send the HELP command for other information > (like subscribing). __________________________________________________ Do You Yahoo!? Sign up for SBC Yahoo! Dial - First Month Free http://sbc.yahoo.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Jack Silvey INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
