+-------------+ +------------------+
| Products    | | Supplier_Product |
+-------------+ +------------------+
| PNO | PNAME | | SNO     | PNO    |
+-----+-------+ +---------+--------+
| P1  | Screw | | S1      | P1     |
| P1  | Screw | | S1      | P1     |
| P1  | Screw | | S1      | P2     |
| P2  | Screw | +------------------+
+-------------+

##</code><code>##

+--------------------+  +-------------------------------+
| Purchased_Items    |  | Package_Deliveries            |
+--------------------+  +-------------------------------+
| Date       | Item  |  | Delivery_Company | Date       |
+------------+-------+  +------------------+------------+
| 2005/12/01 | Screw |  | FedEx            | 2005/12/01 |  
| 2005/12/01 | Screw |  | FedEx            | 2005/12/01 |
| 2005/12/01 | Screw |  | FedEx            | 2005/12/02 |
| 2005/12/02 | Screw |  +-------------------------------+
+--------------------+