DATABASE A B C D 1 20 M 101 2 21 N 102 3 22 O 103 1 21 M 104 4 22 O 105 Find out which of the following dependencies are valid or not. For each dependency, briefly write the reasons. A -> BCD AB -> C AB -> D

Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
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DATABASE

A

B

C

D

1

20

M

101

2

21

N

102

3

22

O

103

1

21

M

104

4

22

O

105

Find out which of the following dependencies are valid or not. For each dependency, briefly write the reasons.

  1. A -> BCD
  2. AB -> C
  3. AB -> D
  4. D -> ABC
  5. BC -> A
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