---
title: "sums(_:_:order:)"
framework: tabulardata
role: symbol
role_heading: Instance Method
path: "tabulardata/rowgroupingprotocol/sums(_:_:order:)"
---

# sums(_:_:order:)

Generates a data frame that contains the sum of each group’s rows along a column you select by name.

## Declaration

```swift
func sums<N>(_ columnName: String, _ type: N.Type, order: Order? = nil) -> DataFrame where N : AdditiveArithmetic, N : Comparable
```

## Parameters

- `columnName`: The name of a column.
- `type`: The type of the column.
- `order`: A sorting order the method uses to sort the data frame by its sum column.

## See Also

### Aggregating a Row Grouping

- [counts()](tabulardata/rowgroupingprotocol/counts().md)
- [counts(order:)](tabulardata/rowgroupingprotocol/counts(order:).md)
- [sums(_:order:)](tabulardata/rowgroupingprotocol/sums(_:order:).md)
- [means(_:_:order:)](tabulardata/rowgroupingprotocol/means(_:_:order:).md)
- [means(_:order:)](tabulardata/rowgroupingprotocol/means(_:order:).md)
- [minimums(_:_:order:)](tabulardata/rowgroupingprotocol/minimums(_:_:order:).md)
- [minimums(_:order:)](tabulardata/rowgroupingprotocol/minimums(_:order:).md)
- [maximums(_:_:order:)](tabulardata/rowgroupingprotocol/maximums(_:_:order:).md)
- [maximums(_:order:)](tabulardata/rowgroupingprotocol/maximums(_:order:).md)
- [aggregated(on:into:transform:)](tabulardata/rowgroupingprotocol/aggregated(on:into:transform:).md)
- [aggregated(on:naming:transform:)](tabulardata/rowgroupingprotocol/aggregated(on:naming:transform:).md)