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Message Posted: Thu, 19 Apr 2002 @ 03:11:45 GMT
A null neither matches, nor fails to match, any specified value. Thus, -
WHERE X = :IN_x > AND (Y <> :IN_y OR > Z <> :IN_Z)
does not yield a condition of Z <> :IN_Z since it might match. It is unknown. So, it won't be updated.
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