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Which of the following is an attribute that can uniquely identify a row in a table?

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Which of the following is an attribute that can uniquely identify a row in a table?

(a) Secondary key

(b) Candidate key

(c) Foreign key

(d) Alternate key

I had been asked this question in an online quiz.

This intriguing question comes from Query Processing in portion Query Processing Techniques of Database Management

1 Answer

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Best answer
The correct option is (b) Candidate key

Explanation: A Candidate Key can be any column or a combination of columns that can qualify as unique key in database.

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