[GENERAL] Simulating an outer join

[Bruce Momjian]

I have been thinking about how to simulate an outer join.  It seems the
best way is to do:

        SELECT tab1.col1, tab2.col3
        FROM tab1, tab2
        WHERE tab1.col1 = tab2.col2
        UNION ALL
        SELECT tab1.col1, NULL
        FROM tab1
        WHERE tab1.col1 NOT IN (SELECT tab2.col2 FROM tab2)

Comments?  I know someone was asking about this recently.

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  Bruce Momjian                        |  http://www.op.net/~candle
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