If I knew from your query exactly which records you wanted, this would be
fairly transparent.
I 'm guessing you want want anything modified yesterday.
You want to avoid having to have a function-based index on last_update_date
(sounds right to me).
So you want somthing like:
where last_update_date >= trunc(sysdate-1) and last_update_date <
trunc(sysdate)
Right?
-- --Original Message-- --
From: oracle-l-bounce@(protected)
[mailto:oracle-l-bounce@(protected)]On Behalf Of Wes Brooks
Sent: Monday, August 02, 2004 6:13 AM
To: Oracle-L@(protected)
Subject: SQL Tunning
Hello expert,
I have a table with 40 millions records and the last update date is indexed.
But when we use the
following where clause, it takes forever to run the report.
WHERE TRUNC(last_update_date) = TRUNC(SYSDATE - 1)
How to improve the performance? Do I need to create a new index field on
the table with TRUNC(last_update_date)?
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