Give conditions under which the following expressions are equivalent: where agg denotes any aggregation operation. How can

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Give conditions under which the following expressions are equivalent:

where agg denotes any aggregation operation. How can the above conditions be relaxed if agg is one of min or max?

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Database System Concepts

ISBN: 9780078022159

7th Edition

Authors: Abraham Silberschatz, Henry F. Korth, S. Sudarshan

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Question Posted: Jun 13, 2022 07:09 AM

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Give conditions under which the following expressions are equivalent: where agg denotes any aggregation operation. How can

Question:

A,BY agg(C) (E₁ E₂) and (Yagg(c)(E₁)) □ E₂

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An aggregate function can be used in a WHERE clause only if that clause ...View the full answer

Database System Concepts

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