---
title: mode() function
description: >
  `mode()` returns the non-null value or values that occur most often in a
  specified column in each input table.
menu:
  flux_v0_ref:
    name: mode
    parent: universe
    identifier: universe/mode
weight: 101
flux/v0/tags: [transformtions, aggregates]
introduced: 0.36.0
---

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`mode()` returns the non-null value or values that occur most often in a
specified column in each input table.

If there are multiple modes, `mode()` returns all mode values in a sorted table.
If there is no mode, `mode()` returns `null`.

**Note**: `mode()` drops empty tables.

##### Function type signature

```js
(<-tables: stream[A], ?column: string) => stream[{B with _value: C}] where A: Record, B: Record
```

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

## Parameters

### column

Column to return the mode from. Default is `_value`.



### tables

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




## Examples

### Return the mode of each input table

```js
import "sampledata"

sampledata.int()
    |> mode()

```

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{{% expand "View example input and output" %}}

#### Input data

| _time                | _value  | *tag |
| -------------------- | ------- | ---- |
| 2021-01-01T00:00:00Z | -2      | t1   |
| 2021-01-01T00:00:10Z | 10      | t1   |
| 2021-01-01T00:00:20Z | 7       | t1   |
| 2021-01-01T00:00:30Z | 17      | t1   |
| 2021-01-01T00:00:40Z | 15      | t1   |
| 2021-01-01T00:00:50Z | 4       | t1   |

| _time                | _value  | *tag |
| -------------------- | ------- | ---- |
| 2021-01-01T00:00:00Z | 19      | t2   |
| 2021-01-01T00:00:10Z | 4       | t2   |
| 2021-01-01T00:00:20Z | -3      | t2   |
| 2021-01-01T00:00:30Z | 19      | t2   |
| 2021-01-01T00:00:40Z | 13      | t2   |
| 2021-01-01T00:00:50Z | 1       | t2   |


#### Output data

| *tag | _value  |
| ---- | ------- |
| t1   |         |

| *tag | _value  |
| ---- | ------- |
| t2   | 19      |

{{% /expand %}}
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