Agnes Has Been Using XQuery to Design Queries Using Path

question 56

Multiple Choice

Agnes has been using XQuery to design queries using path expressions. Her next project will involve multiple source documents and require more complicated criteria. She has heard that a FLWOR structure could be effective for such cases, and comes to you for assistance in developing a FLWOR structure query.
-Agnes is confused by the rules about how many of each type of clause are required in a FLWOR structure. You tell her that in a FLWOR structure, the _____ clause is optional.

• A) where
• B) for
• C) let
• D) return

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Definitions:

F Table

A chart used in statistics that provides critical values for the F-distribution, helpful in analyzing variances by comparing the ratio of two sets of data.

Degrees Of Freedom

The number of independent values in a statistical calculation that can vary without violating the calculation's constraints.

F Distribution

A probability distribution used in analysis of variance (ANOVA), particularly in the context of comparing variances across different groups.

Degrees Of Freedom

The number of independent values or quantities which can be assigned to a statistical distribution, often reflecting the number of independent pieces of information.