COMPUTER FUNDAMENTALS

COMPUTER APPLICATIONS

DATABASE MANAGEMENT SYSTEMS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The relationship between two entities can be given using the lower and upper limits.This information is called____
A
Cardinality
B
Composite entity
C
Optional relationships
D
Business rules
Explanation: 

Detailed explanation-1: -The cardinality of a relationship is the number of related rows for each of the two objects in the relationship. The rows are related by the expression of the relationship; this expression usually refers to the primary and foreign keys of the underlying tables.

Detailed explanation-2: -In a database, cardinality usually represents the relationship between the data in two different tables by highlighting how many times a specific entity occurs in comparison to another.

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