> For the complete documentation index, see [llms.txt](https://docs-v3.toucantoco.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs-v3.toucantoco.com/data-management-in-datahub/datasets-in-toucan/preparing-data/overview-of-youprep-tm/aggregate/add-total-rows.md).

# Add total rows

The Add total rows step allows you to compute “Total” columns and append those rows to your current dataset

### Step parameters

* `Columns to compute total rows in`: Specify a dimension columns on the left side, and the corresponding total rows label on the right side. You can add several couples to compute total rows in several columns.
  * `Columns to aggregate`: in this section of the form you can specify one or more columns to aggregate, with the corresponding aggregation function to be applied .You can add columns to aggregate by clicking on the button `Add aggregation`.
    * `Columns`: the columns to be aggregated (you can apply the same aggregation function to several columns at once)
    * `Function` the aggregation function to be applied (`sum`, `average`, `count`, `count`` ``distinct`, `min`, `max`, `first` or `last`)
  * `(Optional) Group by`: Optional, if you need to apply the total rows computation by group of rows

### Example

**Input**

<figure><img src="/files/rH7ObCj2QdYNDjSFr0ep" alt=""><figcaption><p>Aggregate - add total rows input</p></figcaption></figure>

**Configuration**

```json
{
    "totals_dimensions": [
        {
            "total_col": "country",
            "total_rows_label": "all countries"
        }
    ]
    "aggregations": [
        {
            "columns": ["value1"],
            "aggfunction": "sum"
        }
    ],
    "group_by": []
}
```

**Output**

<figure><img src="/files/9s6zkXMaGbH7BrbDEh3x" alt=""><figcaption><p>Aggregate - add total rows output</p></figcaption></figure>


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