> For the complete documentation index, see [llms.txt](https://docs.pentaho.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pentaho.com/pba-report-designer/10.2-report-designer/function-reference/running-functions.md).

# Running functions

The **Running** category contains mathematical functions that deal with running totals, as opposed to global or summary totals.

| Function Name        | Purpose                                                                                                       |
| -------------------- | ------------------------------------------------------------------------------------------------------------- |
| **Sum**              | Calculates a running total sum of the specified column.                                                       |
| **Count**            | Counts the items in a group or report.                                                                        |
| **Group Count**      | Counts the number of groups in a report.                                                                      |
| **Count Distinct**   | Counts the distinct occurrences of a certain value in a column.                                               |
| **Average**          | Calculates the average value in a given column.                                                               |
| **Minimum**          | Identifies the lowest or smallest value in a column.                                                          |
| **Maximum**          | Identifies the highest or largest value in a column.                                                          |
| **Percent of Total** | Calculates the percentage value of a numeric column. The total sum is divided by the number of items counted. |


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