Oracle FAQ Your Portal to the Oracle Knowledge Grid
HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US
 

Home -> Community -> Usenet -> c.d.o.misc -> Re: optimize this query

Re: optimize this query

From: DA Morgan <damorgan_at_psoug.org>
Date: Thu, 01 Dec 2005 08:22:17 -0800
Message-ID: <1133454124.314372@jetspin.drizzle.com>


Sreelal wrote:
> in the following qry,
>
> SELECT D_RIF_SALD FROM
> (SELECT DISTINCT D_RIF_SALD FROM GP_TR_CONTR_VAR ORDER BY 1 DESC)
> WHERE ROWNUM <= 3;
>
> Suppose the table contains >1 crore records the query will be slow as
> we are
> using Distinct on a column which repeats . Now it takes > 80 secs
> Any idea to make the query fast
>
> Kalu

Oracle version?
Explain plan?

-- 
Daniel A. Morgan
http://www.psoug.org
damorgan_at_x.washington.edu
(replace x with u to respond)
Received on Thu Dec 01 2005 - 10:22:17 CST

Original text of this message

HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US