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From: James HH. Lampert
Consider the following scenario:
Does this work?
SELECT * FROM FOO WHERE
EXISTS (SELECT 1 FROM QUUX, BAR WHERE QUUX.FOOKEY = FOO.KEY
AND QUUX.RECTYP = 'BAR' AND QUUX.SUBKEY = BAR.KEY AND
BAR.FWEEP = 2) AND
EXISTS (SELECT 1 FROM QUUX, BAZ WHERE QUUX.FOOKEY = FOO.KEY
AND QUUX.RECTYP = 'BAZ' AND QUUX.SUBKEY = BAZ.KEY AND
BAZ.BOZ = 'SPAM') AND
EXISTS (SELECT 1 FROM QUUX, GAZONK WHERE QUUX.FOOKEY = FOO.KEY
AND QUUX.RECTYP = 'GAZ' AND QUUX.SUBKEY = GAZONK.KEY AND
GAZONK.GRIFFY = 3.14159)
Performance in SQL as always depends on indexes.
Joe
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