Where Clause property
The Where Clause
property is used to select records from the main table of the dataset query.
In this Where Clause you can use the fields that are already present as report input fields.
An example:
tdsls401.item = :tcibd001.item
In this example a dataset is created with the Order Lines (tdsls401) for the Item (tcibd001) that is already printed on the report.