On Sun, Mar 30, 2003 at 03:06:46 +0000,
"Daniel R. Anderson" <dan@mathjunkies.com> wrote:
> Hi all,
>
> I have tables A, B, and C. foo within Table B & C references foo in
> table A. I want bar in table C to reference bar in table B -- but I
> want it to reference only those bars in B with a foo that is the same.
>
> Is that possible?
If foo + bar is a candidate key for B, then you can use a multicolumn
foriegn key. If foo + bar isn't a candidate key for B, then I think you
will need to explain more about what you are trying to do.