Van T. Dinh wrote:
No, you can only have _one_ Primary Key per Table. You can include
up to 10
Fields as a composite PK (but this isn't the situation you
described).

You may have many keys in a single table. Don't be put off by having to
choose one as the PRIMARY key. It may have special meaning to the
database *product* but not for current relational theory.

Jamie.

--