---
title: cumulativeSum() function
description: cumulativeSum() computes a running sum for non-null records in a table.
url: https://docs.influxdata.com/flux/v0/stdlib/universe/cumulativesum/
estimated_tokens: 1262
product: Flux
version: v0
---

# cumulativeSum() function

-   Flux 0.7.0+
-   View InfluxDB support

`cumulativeSum()` computes a running sum for non-null records in a table.

The output table schema will be the same as the input table.

##### Function type signature

```js
(<-tables: stream[A], ?columns: [string]) => stream[B] where A: Record, B: Record
```

For more information, see [Function type signatures](/flux/v0/function-type-signatures/).

## Parameters

### columns

List of columns to operate on. Default is `["_value"]`.

### tables

Input data. Default is piped-forward data (`<-`).

## Examples

### Return the running total of values in each table

```js
import "sampledata"

sampledata.int()
    |> cumulativeSum()
```

[](#view-example-input-and-output)

View example input and output

#### Input data

| _time | _value | *tag |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | -2 | t1 |
| 2021-01-01T00:00:10Z | 10 | t1 |
| 2021-01-01T00:00:20Z | 7 | t1 |
| 2021-01-01T00:00:30Z | 17 | t1 |
| 2021-01-01T00:00:40Z | 15 | t1 |
| 2021-01-01T00:00:50Z | 4 | t1 |

| _time | _value | *tag |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | 19 | t2 |
| 2021-01-01T00:00:10Z | 4 | t2 |
| 2021-01-01T00:00:20Z | -3 | t2 |
| 2021-01-01T00:00:30Z | 19 | t2 |
| 2021-01-01T00:00:40Z | 13 | t2 |
| 2021-01-01T00:00:50Z | 1 | t2 |

#### Output data

| _time | _value | *tag |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | -2 | t1 |
| 2021-01-01T00:00:10Z | 8 | t1 |
| 2021-01-01T00:00:20Z | 15 | t1 |
| 2021-01-01T00:00:30Z | 32 | t1 |
| 2021-01-01T00:00:40Z | 47 | t1 |
| 2021-01-01T00:00:50Z | 51 | t1 |

| _time | _value | *tag |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | 19 | t2 |
| 2021-01-01T00:00:10Z | 23 | t2 |
| 2021-01-01T00:00:20Z | 20 | t2 |
| 2021-01-01T00:00:30Z | 39 | t2 |
| 2021-01-01T00:00:40Z | 52 | t2 |
| 2021-01-01T00:00:50Z | 53 | t2 |

#### Related

-   [Query cumulative sum](/influxdb/v2/query-data/flux/cumulativesum/)
-   [InfluxQL – CUMULATIVE\_SUM()](/influxdb/v1/query_language/functions/#cumulative-sum)

[transformations](/flux/v0/tags/transformations/)