Hi, Stuart

I didn't check it neither, but you may be right. It depends on implementation and I'm pretty sure that various backends treat NULLs differently. I did not check all the variations of all agregate functions :)

Thank you for letting me know.
Grig.

>Hi
>Was having a read on this subject, and found that COUNT is only NULL aware for a specific column and thus SELECT ALL with COUNT is not, NULL aware. Havent tested this yet, but thought i would drop you a line!
>Regards
>Stuart Ramsey