Re: sum query - Mailing list pgsql-sql

From Kretschmer Andreas
Subject Re: sum query
Date
Msg-id 20041204151428.GA5772@kaufbach.delug.de
Whole thread Raw
In response to Re: sum query  (Andrew - Supernews <andrew+nonews@supernews.com>)
List pgsql-sql
am  Sat, dem 04.12.2004, um 12:38:11 -0000 mailte Andrew - Supernews folgendes:

Thank you for the very good explanation.

> Notice I haven't used either IN or UNION. Using IN in place of a join is
> unwise (even though recent versions can sometimes plan it as though it were
> a join); using UNION in place of an outer join is _very_ unwise. (In fact
> UNION / INTERSECT / EXCEPT should normally be reserved for those cases
> where there is simply no alternative.)

Okay. I'm learning ;-)


Andreas
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