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The ___________ operation, denoted by −, allows us to find tuples that are in one relation but are not in another.

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The ___________ operation, denoted by −, allows us to find tuples that are in one relation but are not in another.

(a) Union

(b) Set-difference

(c) Difference

(d) Intersection

This question was addressed to me in an online interview.

Asked question is from Relational Algebra in division Relational Algebra of Database Management

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Correct answer is (b) Set-difference

Explanation: The expression r − s produces a relation containing those tuples in r but not in s.

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