Description of the illustration cncpt059.eps

The image shows the employees table with two columns: employee_id and manager_id. The employee_id column has 3 rows: 210, 211, and 212. The manager_id column has 2 rows: 210 and 211.

5000 is added to each employee number, and therefore each manager. In the first box, under the employee_id column, 210 is updated to 5210. In the second box, under the employee_id column, 211 is updated to 5211 and under the manager_id column, 210 is updated to 5210. In the third box, under the employee_id column, 212 is updated to 5212 and under the manager_id column, 211 is updated to 5211. Then, constraints are checked.