Physical Data Base Design

Once the dis is created, the physical design of the dis is created. Each grouping of data in
the dis results in a separate database design.

Fig. 7.3.6 shows the database design that has resulted from the design of the grouping of
data found in the dis.

Fig. 7.3.6 The physical model.

The physical database design takes into account the physical structure of the data, the
physical characteristics of the data, the specification of keys, the specification of indexes,
and so forth.

The result of the physical specification of the data is a database design, as shown in Fig.
7.3.7.

Chapter 7.3: Data Modeling for the Structured Environment