EBK DATABASE SYSTEMS: DESIGN, IMPLEMENT
EBK DATABASE SYSTEMS: DESIGN, IMPLEMENT
12th Edition
ISBN: 8220101450739
Author: Morris
Publisher: YUZU
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Chapter 5, Problem 6P

Explanation of Solution

Crow’s Foot ER diagrams for Tiny College IT Staffing Solution:

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

Explanation:

  • In the above data model, the overlapping constraint (o) is used as a category symbol. Here the “Employee” supertype entity has optional subtype entity. The primary of “Employee” entity is “Emp_No”.
  • The “Professor”, “Staff” and “Admin” are the subtype entities...

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