---
title: hourSelection() function
description: >
  `hourSelection()` filters rows by time values in a specified hour range.
menu:
  flux_v0_ref:
    name: hourSelection
    parent: universe
    identifier: universe/hourSelection
weight: 101
flux/v0/tags: [transformations, date/time, filters]
introduced: 0.39.0
---

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`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
```

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

## Parameters

### start
({{< req >}})
First hour of the hour range (inclusive). Hours range from `[0-23]`.



### stop
({{< req >}})
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)

```

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#### 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      |

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