---
title: promql.promHistogramQuantile() function
description: promql.promHistogramQuantile() implements functionality equivalent to PromQL’s histogram_quantile() function.
url: https://docs.influxdata.com/flux/v0/stdlib/internal/promql/promhistogramquantile/
estimated_tokens: 711
product: Flux
version: v0
---

# promql.promHistogramQuantile() function

-   Flux 0.47.0+
-   View InfluxDB support

`promql.promHistogramQuantile()` implements functionality equivalent to [PromQL’s `histogram_quantile()` function](https://prometheus.io/docs/prometheus/latest/querying/functions/#histogram_quantile).

**Important**: The `internal/promql` package is not meant for external use.

##### Function type signature

```js
(
    <-tables: stream[A],
    ?countColumn: string,
    ?quantile: float,
    ?upperBoundColumn: string,
    ?valueColumn: string,
) => stream[B] where A: Record, B: Record
```

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

## Parameters

### tables

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

### quantile

Quantile to compute (`[0.0 - 1.0]`).

### countColumn

Count column name.

### upperBoundColumn

Upper bound column name.

### valueColumn

Output value column name.