Add a summary
The summary field allows you to aggregate and present values of record fields in your report.
The summary field computes these values before the rows in your report are processed, unlike running totals which must process each row first. This may cause your device to use more memory to compute the values.
Note:
The summary field is currently available in reports created with C#.
To add a summary to your report:
When run, the report returns the summary values.