You can use group parentheses to group a set of expressions. A group is a set of expressions that are explicitly combined with parentheses. You can only group a set of expressions that form a subclause (a set of expressions that can be logically treated as a single expression).

Use group parentheses to make complex expressions easier to
understand or to force a certain order of evaluation. For example,
when more than one **OR** expression occurs within a complex
query, use parentheses to indicate which expression should be
evaluated first.

By making a set of expressions a group, you ensure that the
expressions of the group are treated together and evaluated first.
Groups have a higher operator precedence than the logical operators
**AND**, **OR**, and **NOT**. For more information about
how queries are evaluated and operator precedence, see About Logical Operators and Operator
Precedence.

**Related Topics**

Using Queries to Locate Resources Overview