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Database-Management-System
August 29, 2024
Database-Management-System
August 29, 2024
Database-Management-System
August 29, 2024
Database-Management-System
August 29, 2024

Database-Management-System

Question 466
Let pk(R) denotes primary key of relation R. A many-to-one relationship that exists between two relations R1 and R2 can be expressed as follows :
A
pk(R2) → pk(R1)
B
pk(R1) → pk(R2)
C
pk(R2) → R1 ∩ R2
D
pk(R1) → R1 ∩ R2
Question 466 Explanation: 
Consider an example, where we have two entities Employee(whose primary key is R1) and Department(whose primary key is R2) and a department have many employees and each employee works in one department i.e. many to one relationship.



Correct Answer: B
Question 466 Explanation: 
Consider an example, where we have two entities Employee(whose primary key is R1) and Department(whose primary key is R2) and a department have many employees and each employee works in one department i.e. many to one relationship.



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