* Reto Baumann
> I'm working on a book database with some special requirements.
> Each book is associated with some keywords and put into a
> category. Category 0 is special, as this is "Unsorted", i.e. not
> associated with a category (which most books are at the moment).
>
> For thei query, let's
Hi all
I'm working on a book database with some special requirements. Each book is associated
with some keywords and put into a category. Category 0 is special, as this is
"Unsorted", i.e. not associated with a category (which most books are at the moment).
For thei query, let's simplify the st
