Database Systems: Design  Implementation  & Management
Database Systems: Design Implementation & Management
11th Edition
ISBN: 9781305850378
Author: Coronel
Publisher: Cengage
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Chapter 5, Problem 9C

Explanation of Solution

Crow’s Foot ER diagrams for support the need of business:

The following data model shows the solution for the given question.

Explanation:

  • In the above data model, the “Person” supertype entity contains “Per_No” as primary key. It contain optional “Author” entity and this entity contain “Per_No” is the primary and foreign key.
  • The person has much expertise to work on the particular research and the “Expertise” has “Per_No” and “Int_code” are the primary and foreign keys.
  • The “Interest” entity contains “Int_code” as primary key...

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