Re[2]: Parentheses and joins

From: Jonathan Gennick <jonathan_at_gennick.com>
Date: Wed, 10 Dec 2003 13:39:50 -0800
Message-ID: <F001.005D9758.20031210133950@fatcity.com>

Wednesday, December 10, 2003, 3:19:24 PM, Jared.Still_at_radisys.com (Jared.Still_at_radisys.com) wrote:

JSrc> I didn't realize that parentheses would affect to optimizer to change the JSrc> join order.

But is it just a performance thing? Given a situation with all inner joins, I can't conceive of the order making any difference at all in the result set. To performance, yes, but not to results.

Next I thought about outer joins. Perhaps order matters more there, but for the life of me I can't conjure up an example of when a different order produces different results.

Best regards,

Jonathan Gennick --- Brighten the corner where you are http://Gennick.com * 906.387.1698 * mailto:jonathan@gennick.com

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Author: Jonathan Gennick
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