Database Systems: Design, Implementation, Management, Loose-leaf Version
Database Systems: Design, Implementation, Management, Loose-leaf Version
12th Edition
ISBN: 9781305866799
Author: Coronel, Carlos; Morris, Steven
Publisher: Course Technology
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Chapter 2, Problem 2P

Explanation of Solution

Crow’s Foot notation:

In the Crow’s Foot model by the three-pronged crow’s foot to exhibit the “many” side relationship.

  • In this notation, “1”is represented as a short line segment.
  • “M” is represented as three-pronged crow’s foot.
  • The relationship name is represented above the relationship line.

Crow’s Foot ERD (Entity Relationship Diagram):

  • The business rule in the problem 1 in the textbook describes about the relationship between AGENT and CUSTOMER and it is written as follows.
    • One agent can have many customers, but each customer has only one agent...

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