Show AllAn expression is a calculation that uses a combination of operators, functions, field names, and constants. You can use an expression as criteria to select records. To use an expression in the Criteria pane, you select the field in the Criteria Field that contains the values you want to evaluate, and then you enter an operator and value in the Value box.
Expressions that use arithmetic operators
Expressions that use comparison operators
Expressions that use logical operators
Expressions that use other types of operators