Subreports can be used to provide a different view of the data in the primary report. For example, you might want to show summary values at the top of a report and details at the bottom.
This can be done in a variety of ways. The two easiest methods are:
By creating the summary report as the primary report and the details report as the subreport. In this method, the details subreport would be placed in the Report Footer section.
By creating the details report as the primary report and the summary report as the subreport. In this method, the summary report would be placed in the Report Header section.
Use the appropriate link fields to link the report and coordinate the data.