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Chapter 12. Using Subreports and Multi-P... > Understanding Linked Versus Unlinked...

Understanding Linked Versus Unlinked Subreports

The hypothetical COO scenario just explored highlights an example of an unlinked Subreport. In Crystal Reports terminology, this means that the parent, or main, report did not have any specific data connections (or links) to its related child report (the Subreport). Unlinked Subreports are completely independent from their main reports and do not rely on the main report for any data. Many reporting problems in which multiple views of the same or different data sources are required in a single presentation can be resolved with unlinked Subreports. If a requirement exists to share data between the parent/main report and its Subreport, linked reports provide the answer.

Contrary to unlinked Subreports, linked Subreports are bound (or linked) to the data in their associated main report. The links are defined in the Link tab of the Insert Subreport dialog shown in Figure 12.4.


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