Crystal Reports 2011: Create a Summary Report
Summary reports are reports in which the data in the group section appears but data in the body section does not. For example, a summary report might display sales totals by region but not include the details for each store within the region. You can format summary reports so that the underlying data is available when users choose to drill down on the summary information in the report.
Note that to create a summary report, the report must contain at least one group as well as a summary field.
In this tutorial, you will create a summary report.