In this illustration, the tables are all_personattrs, all_studentattrs, and all_employeeattrs. These tables contain the attributes for the person (ssn, name, and address), student (deptid and major), and employee (empid and mgr) types respectively.

The Person_v view is based on the all_personattrs table, the Student_v view is based on the all_studentattrs table, and the Employee_v view is based on the all_employeeattrs table.