What type of functions are used in the query?

HOTSPOT You have the following Transact-SQL query:

What type of functions are used in the query? To answer, select the appropriate options in the answer area. NOTE: Each correct selection is worth one point.

Answer:

Explanation:

Box 1: Scalar

The return value of a function can either be a scalar (single) value or a table.

Box 2: Table-Valued

The APPLY operator allows you to invoke a table-valued function for each row returned by an outer table expression of a query. The table-valued function acts as the right input and the outer table expression acts as the left input. The right input is evaluated for each row from the left input and the rows produced are combined for the final output. The list of columns produced by the APPLY operator is the set of columns in the left input followed by the list of columns returned by the right input.

References:

https://msdn.microsoft.com/en-us/library/ms186755.aspx https://technet.microsoft.com/en-us/library/ms175156(v=sql.105).aspx