Database Concepts (8th Edition)
8th Edition
ISBN: 9780134601533
Author: David M. Kroenke, David J. Auer, Scott L. Vandenberg, Robert C. Yoder
Publisher: PEARSON
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Expert Solution & Answer
Chapter 4, Problem 4.25RQ
Explanation of Solution
Recursive relationship:
An entity which calls by itself more than once in different roles with a relationship are termed as a recursive relationship.
Example:
Consider the “Employee” can be in post of “Manager” and a “Manager” can manage an employee. So, “Manages” is relationship with “Employee” entity in recursive manner.
E-R diagram for the above example:
The following “E-R diagram” demonstrates an employee has a manager and the manager manages many employees.
Explanation:
Employee entity “1:M” relationship with “Manages” relationship which means an employee can be in the post of manager and a manager can manage many employees...
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Explian this C program
#include <stdio.h>
unsigned int rotateRight(unsigned int num, unsigned int bits) {
unsignedint bit_count =sizeof(unsignedint) *8;
bits = bits % bit_count; // Handle cases where bits >= bit_count
return (num >> bits) | (num << (bit_count - bits));
}
int main() {
unsignedint num, bits;
printf("Enter a number: ");
scanf("%u", &num);
printf("Enter the number of bits to shift: ");
scanf("%u", &bits);
printf("After rotation: %u\n", rotateRight(num, bits));
return0;
}
Explian thiS C program
#include<stdio.h>
int countSetBits(int n) { int count = 0; while (n) { count += n & 1; n >>= 1; } return count;}
int main() { int num; printf("Enter a number: "); scanf("%d", &num); printf("Output: %d units\n", countSetBits(num)); return 0;}
Chapter 4 Solutions
Database Concepts (8th Edition)
Ch. 4 - Prob. 4.1RQCh. 4 - Prob. 4.2RQCh. 4 - Prob. 4.3RQCh. 4 - What is a use case, and what is its purpose?Ch. 4 - Give an example of a data constraint.Ch. 4 - Prob. 4.6RQCh. 4 - Define the term entity, and give an example other...Ch. 4 - Explain the difference between an entity class and...Ch. 4 - Define the term attribute, and give examples for...Ch. 4 - Define the term identifier, and indicate which...
Ch. 4 - Prob. 4.11RQCh. 4 - Prob. 4.12RQCh. 4 - Prob. 4.13RQCh. 4 - Prob. 4.14RQCh. 4 - List and give an example of the three types of...Ch. 4 - Prob. 4.16RQCh. 4 - Prob. 4.17RQCh. 4 - Prob. 4.18RQCh. 4 - Define the term weak entity, and give an example...Ch. 4 - Explain the ambiguity in the definition of the...Ch. 4 - Define the term associative entity, and give an...Ch. 4 - Define the terms supertype, subtype, and...Ch. 4 - What is an exclusive subtype relationship? Give an...Ch. 4 - What is an inclusive subtype relationship? Give an...Ch. 4 - Prob. 4.25RQCh. 4 - Prob. 4.26RQCh. 4 - Prob. 4.27RQCh. 4 - Prob. 4.28RQ
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