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UGC-NET | NTA UGC NET 2019 June – II | Question 7

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Which of the following key constraints is required for the functioning of the foreign keys in the context of a relational database? (A) Unique Key (B) Primary Key (C) Candidate Key (D) Check key

Answer: (B)

Explanation: A foreign key is a key whose values depend on the primary key of a relation. So for the functioning of a foreign key in the context of a relational database we need a primary key.

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Last Updated : 02 Dec, 2021
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