Answered: Find (i) the intersection of r and s…

Find (i) the intersection of r and s (rs) (ii) the union of r and s (r Us) (iii) the difference between r and s (r - s).

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

Rod Cutting

A naïve solution for the above-stated problem is to evaluate all of the possible combinations of different pieces of varying size to find the maximum revenue-generating combination. Although this method seems the easiest and quick to practice, it has exponential time complexity. So there is a need to figure out a better method than this.

Question

Given the following relations:
A
B
C
3
9
8
14
5
8
7
12
r
E
0
В
8
S
A
α
В
Y
8
Find (i) the intersection of r and s (rs)
(ii) the union of r and s (r Us)
(iii) the difference between r and s (rs).
B
4
5
6
7
C
6
8
10
12

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