The figure shows the horizontal storage model, in which each view or subview is based on a different table.

The tables are only_person, only_students, and only_employees. The Person_v view is based on the only_person table, the Student_v view is based on the only_students table, and the Employee_v view is based on the only_employees table.

The tables all contain person attributes. In addition, only_students contains student attributes and only_employees contains employee attributes. The views contain the same attributes as the underlying tables.