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Key to represent relationship between tables is called

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Key to represent relationship between tables is called

(a) Primary key

(b) Secondary Key

(c) Foreign Key

(d) None of the mentioned

The question was asked in an international level competition.

This interesting question is from Entity-Relationship Design Issues in division Database Systems Design and Implementation of Database Management

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Correct choice is (c) Foreign Key

The best explanation: Primary key of one relation used as an attribute in another relation is called foreign key.

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