Database-Management-System
August 29, 2024UGC NET CS 2017 Jan- paper-3
August 29, 2024Database-Management-System
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Question 466
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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 :
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pk(R2) → pk(R1)
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pk(R1) → pk(R2)
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pk(R2) → R1 ∩ R2
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pk(R1) → R1 ∩ R2
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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.