---
title: pagerduty.dedupKey() function
description: pagerduty.dedupKey() uses the group key of an input table to generate and store a deduplication key in the _pagerdutyDedupKeycolumn. The function sorts, newline-concatenates, SHA256-hashes, and hex-encodes the group key to create a unique deduplication key for each input table.
url: https://docs.influxdata.com/flux/v0/stdlib/pagerduty/dedupkey/
estimated_tokens: 1473
product: Flux
version: v0
---

# pagerduty.dedupKey() function

-   Flux 0.43.0+
-   View InfluxDB support

`pagerduty.dedupKey()` uses the group key of an input table to generate and store a deduplication key in the `_pagerdutyDedupKey`column. The function sorts, newline-concatenates, SHA256-hashes, and hex-encodes the group key to create a unique deduplication key for each input table.

##### Function type signature

```js
(<-tables: stream[A], ?exclude: [string]) => stream[{A with _pagerdutyDedupKey: string}]
```

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

## Parameters

### exclude

Group key columns to exclude when generating the deduplication key. Default is \["\_start", “\_stop”, “\_level”\].

### tables

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

## Examples

### Add a PagerDuty deduplication key to output data

```js
import "pagerduty"
import "sampledata"

sampledata.int()
    |> pagerduty.dedupKey()
```

[](#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 | _pagerdutyDedupKey |
| --- | --- | --- | --- |
| 2021-01-01T00:00:00Z | -2 | t1 | 18fae60f7253ebb11c5cc79e69037f0320fec216b1be0c101a5575086a3ebd08 |
| 2021-01-01T00:00:10Z | 10 | t1 | 18fae60f7253ebb11c5cc79e69037f0320fec216b1be0c101a5575086a3ebd08 |
| 2021-01-01T00:00:20Z | 7 | t1 | 18fae60f7253ebb11c5cc79e69037f0320fec216b1be0c101a5575086a3ebd08 |
| 2021-01-01T00:00:30Z | 17 | t1 | 18fae60f7253ebb11c5cc79e69037f0320fec216b1be0c101a5575086a3ebd08 |
| 2021-01-01T00:00:40Z | 15 | t1 | 18fae60f7253ebb11c5cc79e69037f0320fec216b1be0c101a5575086a3ebd08 |
| 2021-01-01T00:00:50Z | 4 | t1 | 18fae60f7253ebb11c5cc79e69037f0320fec216b1be0c101a5575086a3ebd08 |

| _time | _value | *tag | _pagerdutyDedupKey |
| --- | --- | --- | --- |
| 2021-01-01T00:00:00Z | 19 | t2 | e137b67e3ecac75539ab3f0c139e421433c389c7a9932a878aff5405712dc384 |
| 2021-01-01T00:00:10Z | 4 | t2 | e137b67e3ecac75539ab3f0c139e421433c389c7a9932a878aff5405712dc384 |
| 2021-01-01T00:00:20Z | -3 | t2 | e137b67e3ecac75539ab3f0c139e421433c389c7a9932a878aff5405712dc384 |
| 2021-01-01T00:00:30Z | 19 | t2 | e137b67e3ecac75539ab3f0c139e421433c389c7a9932a878aff5405712dc384 |
| 2021-01-01T00:00:40Z | 13 | t2 | e137b67e3ecac75539ab3f0c139e421433c389c7a9932a878aff5405712dc384 |
| 2021-01-01T00:00:50Z | 1 | t2 | e137b67e3ecac75539ab3f0c139e421433c389c7a9932a878aff5405712dc384 |