HP Intelligent Management Center Standard Software Platform - Manual (Page 640)

What are subreports?
A subreport is a report within a report. The process for creating a subreport
is similar to the process of creating a regular report. A subreport can have
most of the characteristics of a report, including its own record selection
criteria. The only differences between a subreport and a primary report are
that a subreport:
• Is inserted as an object into a primary report; it cannot stand on its own
(although a subreport can be saved as a primary report).
• Can be placed in any report section and the entire subreport will print in
that section.
• Cannot contain another subreport.
• Does not have Page Header or Page Footer sections.
There are four instances in which a subreport would typically be used:
• To combine unrelated reports into a single report. See Combining
unrelated reports by using subreports .
• To coordinate data that cannot otherwise be linked. See Using subreports
with unlinkable data .
• To present different views of the same data within a single report. See
Showing different views of the same data in a report .
• To perform one-to-many lookups from a field that is not indexed on the
lookup field.
For more information, see "One-to-many links" in the online help.
Note:
You can increase the performance of reports containing subreports by using
on-demand subreports instead of regular, in-place subreports.
640 Crystal Reports 2008 SP3 User's Guide
Subreports 24
What are subreports?