With Report Designer, you can force a control to
calculate one of the standard summary functions (Average, Summary,
Count, Running Summary, Percentage, Max or
Min).
To calculate summaries (totals) within a report, follow the instructions
below.
To display the result at the bottom of a report, the report footer band
should be present. To add it, right-click anywhere over the report's area and in
the invoked popup menu, select
Insert Band | ReportFooter.
Click the field for which a summary will be calculated, to select it. Then,
hold down CTRL and drag the field onto the Report Footer area, to create an
exact copy of the Label that will display
the summary.
Note
You can also create a new label for your total by simply dragging it from the
Control
Toolbox .
Now, select the newly created Label, click its Smart Tag , and in its
actions list, click the ellipsis button for the Summary item. And, in the
invoked Summary Editor, specify the summary options.
The following image shows an example of how you can set up your total. Note
that the Summary Running option is set to Report, to ensure that
all values from the specified data field are taken into account.
Note
The Ignore NULL values option won't affect the result in this example,
since NULL values are treated like zeros, by default. So, Sum won't change
whether these values are taken into account or not. This option makes sense for
functions like Count or Average, because the number of elements
counted will depend on it.
To save the settings and close the dialog, click OK.