> ## Documentation Index
> Fetch the complete documentation index at: https://docs.anlytic.com/llms.txt
> Use this file to discover all available pages before exploring further.

# IsNotNull

Returns True if the argument is not Null (contains data), and False if the argument contains missing data values.

**Category:** `logical`

**Syntax:**

```
IsNotNull(argument)
```

**Returns:** `BooleanColumn`

**Context Filtering:** ✓ Yes

## Parameters

| Name       | Type          | Required | Description                                                                    |
| ---------- | ------------- | -------- | ------------------------------------------------------------------------------ |
| `argument` | `column\|any` | ✓ Yes    | Any argument can be provided. The function can analyze one argument at a time. |

## Validation

* Minimum parameters: 1
* Maximum parameters: 1

## Examples

```
IsNotNull([Sales])
```

Returns True for rows where sales data exists and False for rows where there is no data.