Since the Expression Builder relies on specific data values entered by users, the manner in which the data is presented is crucial. It is important to know the proper syntax of your expressions. One of the most common errors in building expressions is that the expression has been entered incorrectly. The basic required format is as follows:
Expressions require the following syntax:
value operator value
where value is a constant or a data source and operator is a mathematical or relational symbol.
For detailed information on expression syntax, refer to the following: