Adding a Conditional Statement

To add a conditional statement:

Open Query Builder.
In the Query Builder window, click the Conditions tab.
Select a table from the upper left side of the Query Builder. If necessary, click the plus sign to expand the list of tables.
Select a field from the upper right side of the Query Builder. This field displays all fields that belong to the selected table. Double-click the field to add it to the grid at the bottom of the dialog box.
The Assign Condition dialog box opens automatically. You can open this dialog box at any time by double-clicking a statement in the grid.
Select an Operator.
In the Value is field, specify a value or click Browse to select a value from all existing entries for that field.

If you select "In" as an operator, the values must have quotation marks around each entry.
Select Case Sensitive Compare if you want the capitalization of the value used as part of the condition. By default this option is selected.

If you are using MS SQL Server, the Case Sensitive Compare option is not applicable. All queries are case insensitive.
If necessary, select Use Value as a Literal.
Click OK.
To add another condition statement, repeat steps 1–9, and then select the appropriate connector.