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The algorithm that uses a secondary ordered index to guide retrieval for comparison conditions involving <,≤,≥, or > is

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The algorithm that uses a secondary ordered index to guide retrieval for comparison conditions involving <,≤,≥, or > is

(a) A2

(b) A4

(c) A5

(d) A6

The question was posed to me in my homework.

I'd like to ask this question from Selection Operation in portion Query Processing Techniques of Database Management

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The correct answer is (d) A6

Easiest explanation - A6 – Secondary index, comparison.

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