# Consider the following instance of a relation R(A, B, C, D): A B C D a1 b1 c1 d1 a1

This problem has been solved!

Do you need an answer to a question different from the above? Ask your question!

## Question:

Consider the following instance of a relation R(A, B, C, D):

A B C D

a1 b1 c1 d1

a1 b2 c1 d2

a2 b1 c1 d1

Explain

A. Does this instance satisfy B → D?

B. Does this instance satisfy BC → D?

C. Does this instance satisfy C → D?

D. Can the following be proven using Armstrong's Axioms? Explain your answer. If BC → D and B → D, then C → D

**Related Book For**

## Operations and Supply Chain Management

ISBN: 978-1119444404

9th edition

Authors: Roberta S. Russell, Bernard W. Taylor

**View Solution**

Create a free account to access the answer

**Cannot find your solution?**

Post a FREE question now and get an answer within minutes.
* Average response time.

**Question Details**

Chapter #

**17**Section: Exercise Questions

Problem: 50