A parameter query is a type of query that, when run, prompts you for
criteria that is used for the result set. For example, a query that returns
information about employee salaries may use a parameter for the employee's
name. Based on the name you provide, a different result set is returned.
To create a parameter query, in the Microsoft Query Criteria pane, type a
text string that is surrounded by square brackets [] in the Value field for
the field to which you want to apply the parameter.
NOTE: Do not type the exact name of the field inside the square brackets.
A parameter (the text you type inside the square brackets) can be up to 255
characters and can contain any characters other than control characters or
square brackets. You can use a parameter in expressions, and you can use
more than one parameter in a single expression. For example, you can type
the following parameter in the Date field:
>=[Start Date] AND <=[End Date]