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But if I get a performance boost, I'll change my ways...... <
There is no performance difference between explicit (i.e. JOIN) and implicit
(i.e. WHERE) syntax. Internally it's the same join processing.
I agree that explicit JOIN syntax is more legible, portable and maintainable
(be kind to the "next" guy). Also there are some explicit joins that are
difficult to do and understand using traditional WHERE syntax (i.e.
EXCEPTION join).
All that said, you still need to know traditional manner of joining using
WHERE clause, as UPDATE and DELETE don't support explicit join syntax but do
support implicit joins.
Elvis
Celebrating 10-Years of SQL Performance Excellence on IBM i5/OS and OS/400
www.centerfieldtechnology.com
-----Original Message-----
Subject: Re: SQL 'Select AS' syntax
Pete
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