SQL>
SQL> CREATE TABLE product (
2 product_name VARCHAR2(25) PRIMARY KEY,
3 product_price NUMBER(4,2),
4 quantity_on_hand NUMBER(5,0),
5 last_stock_date DATE
6 );
Table created.
SQL>
SQL> CREATE TABLE product_order (
2 product_name VARCHAR2(25),
3 salesperson VARCHAR2(3),
4 order_date DATE,
5 quantity NUMBER(4,2)
6 );
Table created.
SQL>
SQL> INSERT INTO product_order VALUES ('Product 1', 'CA', '14-JUL-03', 1);
1 row created.
SQL> INSERT INTO product_order VALUES ('Product 2', 'BB', '14-JUL-03', 75);
1 row created.
SQL> INSERT INTO product_order VALUES ('Product 3', 'GA', '14-JUL-03', 2);
1 row created.
SQL> INSERT INTO product_order VALUES ('Product 4', 'GA', '15-JUL-03', 8);
1 row created.
SQL> INSERT INTO product_order VALUES ('Product 5', 'LB', '15-JUL-03', 20);
1 row created.
SQL> INSERT INTO product_order VALUES ('Product 6', 'CA', '16-JUL-03', 5);
1 row created.
SQL> INSERT INTO product_order VALUES ('Product 7', 'CA', '17-JUL-03', 1);
1 row created.
SQL>
SQL> INSERT INTO product VALUES ('Product 1', 99, 1, '15-JAN-03');
1 row created.
SQL> INSERT INTO product VALUES ('Product 2', 75, 1000, '15-JAN-02');
1 row created.
SQL> INSERT INTO product VALUES ('Product 3', 50, 100, '15-JAN-03');
1 row created.
SQL> INSERT INTO product VALUES ('Product 4', 25, 10000, null);
1 row created.
SQL> INSERT INTO product VALUES ('Product 5', 9.95,1234, '15-JAN-04');
1 row created.
SQL> INSERT INTO product VALUES ('Product 6', 45, 1, TO_DATE('December 31, 2008, 11:30 P.M.','Month dd, YYYY, HH:MI P.M.'));
1 row created.
SQL>
SQL> ALTER TABLE product_order
2 ADD CONSTRAINT product_order_fk_product FOREIGN KEY
3 (product_name) REFERENCES product;
ADD CONSTRAINT product_order_fk_product FOREIGN KEY
*
ERROR at line 2:
ORA-02298: cannot validate (RNTSOFT.PRODUCT_ORDER_FK_PRODUCT) - parent keys not found
SQL>
SQL> drop table product;
Table dropped.
SQL> drop table product_order;
Table dropped.
SQL>