Database Concepts (8th Edition)
Database Concepts (8th Edition)
8th Edition
ISBN: 9780134601533
Author: David M. Kroenke, David J. Auer, Scott L. Vandenberg, Robert C. Yoder
Publisher: PEARSON
Expert Solution & Answer
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Chapter 2, Problem 2.25RQ

Explanation of Solution

Meaning of the Equation:

The given expression is,

A-> (B, C)

Explanation:

The meaning of the following equation is:

  • Given a value for A, user can determine the value of both B and C simultaneously, represented as composite (B, C).
  • Composite (B, C) is functionally dependent on A.
  • A is determinant of the composite (B, C).

Example:

  • For a table Employee containing attributes ‘employee_id’, ‘employee_name’ and ‘employee_department’, it is observed that user can fill an online form asking to enter the ‘employee_id’ and the Database Management System (DBMS) searches the employee database and retrieves the information about ‘employee_name’ and ‘employee_department’ simultaneously...

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