Assume that you have the following relation; R(a,b,c) a b c ---------- 1 A F 2 B M 3 T F 4 R M 5 A F Then the cardinality of the projection operation on c will be = ----- Select one: A. 5 B. 2 C. Non of the mentioned D. 3

Assume that you have the following relation; R(a,b,c) a b c ---------- 1 A F 2 B M 3 T F 4 R M 5 A F Then the cardinality of the projection operation on c will be = ----- Select one: A. 5 B. 2 C. Non of the mentioned D. 3

A Guide to SQL

9th Edition

ISBN:9781111527273

Author:Philip J. Pratt

Publisher:Philip J. Pratt

Chapter2: Database Design Fundamentals

Section: Chapter Questions

Problem 5TD

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Question

database

Assume that you have the following relation; R(a,b,c)

a b c

----------

1 A F

2 B M

3 T F

4 R M

5 A F

Then the cardinality of the projection operation on c will be = -----

Select one:

A. 5

B. 2

C. Non of the mentioned

D. 3

Organized collection of structured information, or data, typically stored in a computer system.

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