I think you misunderstood my db structure... let me see...
[tblOrder] ---<[tblDept]
tblOrder: OrderID*, Z1Number*, DepartmentID (FK), QTY, Price
tblDept: DeptNo*, DeptName
In reality, my table is more like:
[tblInvoice]---<[tblOrder]---<[tblDetails]
[tblOrder]---<[tblDept]
I simplified it for...