Many thanks for your reply Shawn - I have some comments below.
> Hello,
>
> I need to be able to sum over distinct values but I can't seem to do it
> unless I use sub-selects (which I want to avoid doing).
>
> To see what I mean, I've constructed a toy DB:
>
> DROP TABLE IF EXISTS spell;
> CREA
Yasir Assam <[EMAIL PROTECTED]> wrote on 04/03/2006 11:09:01 PM:
> Hello,
>
> I need to be able to sum over distinct values but I can't seem to do it
> unless I use sub-selects (which I want to avoid doing).
>
> To see what I mean, I've constructed a toy DB:
>
> DROP TABLE IF EXISTS spell;
> C
