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