There are two sections on the Expression Builder window: the Simple section and the Advanced section. The steps that you follow to create an expression on a field depend on which cell that you select in the grid in the Conditions section, and which type of expression you want to create.
When you construct expressions in the Expression Builder window, the system does not check whether your syntax is correct. The Expression Builder window is simply an interface for selecting the criteria to include in the expression.
The Expression Builder window closes, and in the grid in the Conditions section, <expr> appears in the field on which you created the expression. You can modify the expression directly in the Advanced section of the Expression Builder window.
In the grid in the Missing variable reference section, in the appropriate Field, Criteria, or Or cell, select . If the Simple section is currently displayed, then select Advanced.
The Advanced section of the Expression Builder window appears.
The Expression Builder window closes, and in the grid in the Conditions section, <expr> appears in the field on which you created the expression. You can modify the expression directly in the Advanced section of the Expression Builder window.
