You can assign a parameter to the SQL statement that you add to the filter or join condition. You can assign the parameter in a customized data object read operation; or in a relational data object in a Read transformation.
The following image shows where you can assign a SQL parameter to a filter or join condition:
When you edit the join or the filter condition, you can use a parameter to specify the condition.
For example, the following image shows the dialog box that you can use to assign a parameter to the SQL statement when you edit the filter condition: