On June 28, 2004 03:02 pm, Stefan Weiss wrote:
> I'm just curious - why is it not possible to use the "=" operator to
> compare values with NULL? I suspect that the SQL standard specified
> it that way, but I can't see any ambiguity in an expression like "AND
> foo.bar = NULL". Is it because NULL does not "equal" any value, and the
> expression should be read as "foo.bar is unknown"? Or is there something
> else I'm missing?
As far as I have been able to tell, it is one of those quirks about SQL that
you shouldn't bother trying to understand. It just IS. <rimshot/>
--
Michael A. Nachbaur <mike@nachbaur.com>
http://nachbaur.com/pgpkey.asc