Hi. 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?
If it's the "unknown" part, then why can't I use "=" to compare with TRUE or FALSE? cheers, stefan ---------------------------(end of broadcast)--------------------------- TIP 4: Don't 'kill -9' the postmaster
