# Group by

> Group the entries of a list by a shared field, and compute totals, averages, or counts for each group.

Groups a collection by a shared field and aggregates values like totals, averages, or counts.

## Configuration

| Field | Required | Description |
|---|---|---|
| **Input** | Yes | The collection (array) to group. |
| **Group by field** | Yes | The field whose value determines the group. |
| **Aggregations** | No | Additional computed fields per group (count, sum, average, min, max, first, last, collect). |

## Example

Group a list of orders by `region` and count the number of orders per region:

- Input: `$vars.fetchOrders1.output.body`
- Group by: `region`
- Aggregation: `orderCount` = count

Output available as `$vars.groupBy1.output`.

## Next steps

- [Transform](node-transform.md): chain several operations in one node.
- [Script](node-script.md): custom logic when no data operation fits.