On 13 Dec 2005 at 6:57, d_dude_2003 wrote:

>Yes now this works as expected. The only thing i am still wondering
>is, why when adding NULL to SOMETHING the result is NULL? Instead of
>SOMETHING?

NULL is SQL representation of unknown value. If you add a SOMETHING
to UNKNOWN, you'll get UNKNOWN for sure.

--
SY, Dimitry Sibiryakov.