Re: SQL Tunning
- From: Edgar Chupit <edgar.chupit@xxxxx>
- To: Wes Brooks <oracle-l@xxxxxxxxxxxxx>
- Date: Mon, 2 Aug 2004 13:24:49 +0300
Hello Wes,
WB> WHERE TRUNC(last_update_date) = TRUNC(SYSDATE - 1)
WB> How to improve the performance? Do I need to create a new index field on
the table with TRUNC(last_update_date)?
You have several opportunities:
a) you can rewrite your query to this:
where last_update_date between trunc(sysdate)-1 and
trunc(sysdate)-1/86400
b) you can create function based index like:
create index tt_idx on tt(trunc(last_update_date));
c) you can add column to your table with values from trunc(last_update_date)
What option to choose mostly depends on your requirements.
--
Best regards,
Edgar
----------------------------------------------------------------
Please see the official ORACLE-L FAQ: http://www.orafaq.com
----------------------------------------------------------------
To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx
put 'unsubscribe' in the subject line.
--
Archives are at //www.freelists.org/archives/oracle-l/
FAQ is at //www.freelists.org/help/fom-serve/cache/1.html
-----------------------------------------------------------------
Other related posts:
