>
> The entity DEPT has a department head as one of its attributes. So the
> department head should be a column in the DEPT table. Since that
> department head is also an employee, you will most likely want a FK
> relationship between the dept head column in DEPT and the EMP_ID column
> of the EMP table.
>
> HTH,
> Brian
>
>
>
> --
>
If you implement this way then you create a circular relationship,
dept references emp and emp also references dept. Isn't that is what
we try to avoid? Besides, you can't enforce the emp_id (department
head) in the dept table is one of the emp in the same department.
Received on Fri May 07 2004 - 07:07:57 CDT
