Chapter 4, Problem 4.2RQ

Explanation of Solution

Data model:

A data model is a logical representation of a database. The structure of data model includes the relationship, content, and constraints that determine how data can be stored and accessed. The data model is transformed into a database design.

The data model can be divided into three types:

• Object based data model.
• Physical data model.
• Record based data model.

Object based data model:

The concepts of entities, attributes, and relationships are used in the object oriented data model.

Physical data model:

This data model describes how data stored in the computer memory...