RE: SQL Statement Tuning

From: Christopher Spence <cspence_at_FuelSpot.com>
Date: Sat, 16 Jun 2001 07:09:22 -0700
Message-ID: <F001.0032C64C.20010616071028@fatcity.com>

Take a look at my website, I recently wrote a 32 page document on tuning sql. I would be very interested in getting feedback from what you think of it.

www.vampired.net under articles.

"Walking on water and developing software from a specification are easy if both are frozen."

Christopher R. Spence
Oracle DBA
Fuelspot

-----Original Message-----
Sent: Saturday, June 16, 2001 6:03 AM
To: Multiple recipients of list ORACLE-L

I'm looking for docs that explain tuning of SQL statements. But, no stories about latches, buffers, TKPROF, blocks, V$ views... Just simple (or advanced?) tips on:

ordering of tables in FROM part of select (where goes the largest table, and where to put the smallest table), and why is it so,
if i have multiple ANDed conditions, in where part of select, where to put the most restrictive, at the left end or at the right end? How does oracle evaluates ANDed and ORed list, from left to right or counterwise?
aditional tips: how to avoid OR and use AND instead, how to make query to use index, tips on EXISTS, NOT IN...

Before diving into V$ stuff, I want do try simple query rewriting.

Thanks in advance

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Author: Christopher Spence
INET: cspence_at_FuelSpot.com

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