A Relational Query Optimizer ____

question 55

Multiple Choice

A relational query optimizer ____.

• A) is a form of a relational catalog
• B) is a separate piece of software that can be added to the relational DBMS environment as an option
• C) can be invoked at the option of the user issuing the query
• D) is only used with queries involving joins
• E) None of the above.

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Definitions:

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