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a) Ax(OB.b2-10B) b) AXA.a4=B.b3 B c) AN (A.a1=B.b1 AND A.a3=B.b2) B

a) Ax(OB.b2-10B) b) AXA.a4=B.b3 B c) AN (A.a1=B.b1 AND A.a3=B.b2) B

Computer Networking: A Top-Down Approach (7th Edition)
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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3. Using tables given below, show the results of the following operations given in relational algebra. A a1 a2 аз a4 c1 c2 2 3 4 4 4 1 8 12 3 4 6 7 4 4 12 4 7 7 6 b2 4 b1 b3 7 12 3 7 4 12 11 7 4 a) Ax(OB.b2>10B) b) AX A.a4=B.b3 B c) AM (A.a1=B.b1 AND A.a3=B.b2) B d) BU (Пlа1, а2, а3) А) e) P (d1, d2, d3)(c1 ICOUNT c2, SUM c2 C) ) C+ (P (62) ( T(a3) A))
Transcribed Image Text:3. Using tables given below, show the results of the following operations given in relational algebra. A a1 a2 аз a4 c1 c2 2 3 4 4 4 1 8 12 3 4 6 7 4 4 12 4 7 7 6 b2 4 b1 b3 7 12 3 7 4 12 11 7 4 a) Ax(OB.b2>10B) b) AX A.a4=B.b3 B c) AM (A.a1=B.b1 AND A.a3=B.b2) B d) BU (Пlа1, а2, а3) А) e) P (d1, d2, d3)(c1 ICOUNT c2, SUM c2 C) ) C+ (P (62) ( T(a3) A))
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