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

# atoti.ExternalColumn

### *final class* atoti.ExternalColumn

Column of an external table.

| [`data_type`](./atoti.ExternalColumn.data_type#atoti.ExternalColumn.data_type) | The type of the elements in the column.                                                                                                    |
| ------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------ |
| [`isin`](./atoti.ExternalColumn.isin#atoti.ExternalColumn.isin)                | Return a condition evaluating to `True` for elements of this column included in the given *elements*, and evaluating to `False` elsewhere. |
| [`isnull`](./atoti.ExternalColumn.isnull#atoti.ExternalColumn.isnull)          | Return a condition evaluating to `True` where this container evaluates to `None`, and evaluating to `False` elsewhere.                     |
| [`name`](./atoti.ExternalColumn.name#atoti.ExternalColumn.name)                | The name of the column.                                                                                                                    |