---
title: promql.quantile() function
description: promql.quantile() accounts checks for quantile values that are out of range, above 1.0 or below 0.0, by either returning positive infinity or negative infinity in the _value column respectively. q must be a float.
url: https://docs.influxdata.com/flux/v0/stdlib/internal/promql/quantile/
estimated_tokens: 487
product: Flux
version: v0
---

# promql.quantile() function

-   Flux 0.47.0+
-   View InfluxDB support

`promql.quantile()` accounts checks for quantile values that are out of range, above 1.0 or below 0.0, by either returning positive infinity or negative infinity in the `_value` column respectively. `q` must be a float.

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

##### Function type signature

```js
(<-tables: stream[A], q: float, ?method: string) => stream[A] where A: Record
```

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

## Parameters

### tables

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

### q

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

### method

Quantile method to use.