---
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.
menu:
  flux_v0_ref:
    name: promql.quantile
    parent: internal/promql
    identifier: internal/promql/quantile
weight: 201
---

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`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
```

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

## Parameters

### tables

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



### q
({{< req >}})
Quantile to compute (`[0.0 - 1.0]`).



### method

Quantile method to use.