On Feb 3, 2008 7:41 PM, Jaime Casanova <systemguards@gmail.com> wrote:
> On Feb 3, 2008 7:26 PM, Omar Bettin <o.bettin@tiscali.it> wrote:
> > Probably I am on the wrong place but for me NULL on numbers means 0 or ZERO.
> > I know about standards...
> >
>
> NULL means unknown value, ZERO is a known value
NULL represents absence of a value. You get the UNKNOWN truth value if
you compare NULL with any data value or another NULL (damn you, 3VL!).
