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 <[EMAIL PROTECTED]> http://nachbaur.com/pgpkey.asc ---------------------------(end of broadcast)--------------------------- TIP 4: Don't 'kill -9' the postmaster
