Help - Tuning SQL

From: Armstead, Michael A <maa25681_at_GlaxoWellcome.com>
Date: Wed, 28 Feb 2001 11:49:13 -0800
Message-ID: <F001.002BFF1F.20010228115118@fatcity.com>

I've got some simple questions on tuning SQL. Please reply with references, I'm not looking for guesses.

• If you have a SELECT statement with a WHERE clause and 2 AND clauses, which one is processed first, the WHERE clause, the first AND clause, or the second AND clause?
• Is there any performance loss in using "<>" over "!="?

Michael Armstead
Database Administrator, OCP-Certified
Corporate & Finance Information Systems
Glaxo SmithKline

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Author: Armstead, Michael A
  INET: maa25681_at_GlaxoWellcome.com

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