CHAPTER 4

Developing Entity-Relationship Diagram

CHAPTER OBJECTIVES
  • Importance of Entity-Relationship diagram in database design.
  • Understanding entities, and how to identify entity from a given problem.
  • Understanding how entities can be related to each other.
  • Knowing relationship types.
  • Knowing participation of an entity into another entity.
  • Representing entity and relationships by using notations.
  • Modelling Entity-Relationship diagram.
  • Converting Entity-Relationship diagram into Relational Model.
  • Understanding object modelling.
  • Identifying classes, subclasses, and superclasses.
  • Drawing class diagrams.
  • Comparison between E-R diagram and class diagram.
  • Summary
4.1 INTRODUCTION

There are various semantic models, such as entity-relationship ...

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