DATABASE CONCEPTS+MYITLAB
DATABASE CONCEPTS+MYITLAB
18th Edition
ISBN: 9780134821245
Author: KROENKE
Publisher: PEARSON C
Expert Solution & Answer
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Chapter 4, Problem 4.13RQ

Explanation of Solution

Relationship:

An association between several entities is termed as relationship.

  • It is used to link the attributes in entities.
  • It is represented in a “diamond” box with name of the relationship in Entity-Relationship diagram.

The following diagram demonstrates the “relationship” among entities.

Difference between relationship class and relationship instance:

Relationship class Relationship instance
It is a relation between one with other entities (or) entity classes...

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