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Which algorithm uses equality comparison on a key attribute with a primary index to retrieve a single record that satisfies the corresponding equality condition.

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Which algorithm uses equality comparison on a key attribute with a primary index to retrieve a single record that satisfies the corresponding equality condition.

(a) A2

(b) A4

(c) A5

(d) A6

I got this question in an online quiz.

Enquiry is from Selection Operation topic in division Query Processing Techniques of Database Management

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The correct choice is (a) A2

The explanation is: A2 – primary index, equality on key.

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