An expression generation rule is an ad hoc rule that generates data from an expression. You can create expression rules with the string, numeric, and date datatypes.
When you create an expression generation rule, you use the
Expression Builder
to create an expression. In the
Expression Builder
, you can choose from a list of columns and functions to include in the expression. To enter a join condition, you can choose columns and operators. Click the
Add
arrow to include the column in the expression.
If you select
Override Data Type to Numeric
for a column with string data type, you cannot enter a numeric expression.
The following image shows the expression generation parameters:
Expression Generation Example
You want to create a Name column that combines the data from the FirstName and LastName columns. You use the following expression to create the rule: