To answer this question, we need to understand the concept of multiple-row operators.
Multiple-row operators are operators that can be used to compare a single value with multiple values in a subquery result set. These operators include "IN", "ALL", and "ANY".
Let's go through each option to understand why it is correct or incorrect:
Option A) IN - This option is a multiple-row operator. It allows you to check if a value matches any value in a list or a subquery result set.
Option B) OF - This option is not a multiple-row operator. It is not used for comparing a single value with multiple values in a subquery result set. Therefore, this option is correct.
Option C) ALL - This option is a multiple-row operator. It allows you to check if a value matches all the values in a list or a subquery result set.
Option D) ANY - This option is a multiple-row operator. It allows you to check if a value matches any one of the values in a list or a subquery result set.
The correct answer is B) OF. This option is not a multiple-row operator.