Data sources typically contain large amounts of data. Reports usually need only a specific subset of data that meets certain conditions. You can select specific records to use in a report by using filters. For example, rather than get information about all customers, you can create filters to select customers in a certain region or customers with a certain credit rank. You can also design filters that provide the report user with the opportunity to specify the filter conditions when the report runs. This section discusses creating filters for which you specify the conditions at design time.