b) Given the following relations: A r & 0 В 8 B 3 8 5 7 C 9 14 8 12 A В 8 D 7 8 S Find (i) the Cartesian product of r and s (rx s). (ii) the Cartesian product of r and s and then performing a selection operation on the result with the predicate r.A = s.A (Or.A-S.A (1 x S)). (iii) the projection of A,C from relation r (Ac (r)). E 10 12

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
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Question
b) Given the following relations:
A
C
9
14
8
12
r
&
0
В
d
B
3
8
5
7
S
A
В
d
D
7
8
Find (i) the Cartesian product of r and s (rs).
(ii) the Cartesian product of r and s and then performing a
selection operation on the result with the predicate r.A = s.A
(Gr.A-s.A (1 x S)).
(iii) the projection of A,C from relation r (Ac (r)).
E
10
12
Transcribed Image Text:b) Given the following relations: A C 9 14 8 12 r & 0 В d B 3 8 5 7 S A В d D 7 8 Find (i) the Cartesian product of r and s (rs). (ii) the Cartesian product of r and s and then performing a selection operation on the result with the predicate r.A = s.A (Gr.A-s.A (1 x S)). (iii) the projection of A,C from relation r (Ac (r)). E 10 12
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