This will invoke the “Insert Subreport” dialog box. To create subreports in Crystal Reports 2013, select “Insert| Subreport…” from the Menu Bar or click the “Insert Subreport” button in the Insert toolbar. This could be used as another way of displaying the “one-to-many” type join between data in related tables. For example, if you create an “Orders” report, you can create a linked subreport that displays the “Order Details” for each record in the “Orders” table. In linked subreports in Crystal Reports 2013, the data in the subreport is matched to data in the primary report. The data is unrelated to each other in much the same way “unlinked” data in tables is unrelated.
Unlinked subreports in Crystal Reports 2013 simply have no relationship between the records displayed in the subreport and the records displayed in the main report. You can create either linked or unlinked subreports in Crystal Reports 2013. Subreports in Crystal Reports 2013 allow you to access and display information from two unrelated reports in a single report, or display multiple views of report data in a single report. Subreports in Crystal Reports 2013 also cannot contain another subreport within them. Subreports in Crystal Reports 2013 are created in the same manner as normal reports, but are then embedded within a main report as a report object. Subreports in Crystal Reports 2013: Overview