---
title: hourSelection() function
description: hourSelection() filters rows by time values in a specified hour range.
url: https://docs.influxdata.com/flux/v0/stdlib/universe/hourselection/
estimated_tokens: 1207
product: Flux
version: v0
---

# hourSelection() function

-   Flux 0.39.0+
-   View InfluxDB support

`hourSelection()` filters rows by time values in a specified hour range.

##### Function type signature

```js
(
    <-tables: stream[A],
    start: int,
    stop: int,
    ?location: {zone: string, offset: duration},
    ?timeColumn: string,
) => stream[A] where A: Record
```

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

## Parameters

### start

(Required) First hour of the hour range (inclusive). Hours range from `[0-23]`.

### stop

(Required) Last hour of the hour range (inclusive). Hours range from `[0-23]`.

### location

Location used to determine timezone. Default is the `location` option.

### timeColumn

Column that contains the time value. Default is `_time`.

### tables

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

## Examples

### Filter by business hours

```js
data
    |> hourSelection(start: 9, stop: 17)
```

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

View example input and output

#### Input data

| _time | tag | _value |
| --- | --- | --- |
| 2022-01-01T05:00:00Z | t1 | -2 |
| 2022-01-01T09:00:10Z | t1 | 10 |
| 2022-01-01T11:00:20Z | t1 | 7 |
| 2022-01-01T16:00:30Z | t1 | 17 |
| 2022-01-01T19:00:40Z | t1 | 15 |
| 2022-01-01T20:00:50Z | t1 | 4 |

#### Output data

| _time | tag | _value |
| --- | --- | --- |
| 2022-01-01T09:00:10Z | t1 | 10 |
| 2022-01-01T11:00:20Z | t1 | 7 |
| 2022-01-01T16:00:30Z | t1 | 17 |

[transformations](/flux/v0/tags/transformations/) [date/time](/flux/v0/tags/date/time/) [filters](/flux/v0/tags/filters/)