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

# Join Datasets

> Import columns from another dataset.

Athina allows you to import columns from another dataset.

This can be useful for:

* Importing ground truth labels from a different dataset.
* Importing classifications from a different dataset.
* Joining 2 datasets for comparison.

### How to Join Datasets

<img src="https://mintlify.s3.us-west-1.amazonaws.com/athinaai/images/datasets/join/join-dataset.png" alt="Join Datasets" />

Click the **Add Columns** button in the **Dataset Sheet** view.

Then select **Import Columns from another Dataset**.

<img src="https://mintlify.s3.us-west-1.amazonaws.com/athinaai/images/datasets/join/import-column-sidebar.png" alt="Import Column Sidebar" />

* **Source Dataset**: Select the dataset you want to import columns from.

* **Columns to Import**: Select 1 or more columns you want to import.

* **Join Condition**:
  * **Current Dataset Column**: Select the column from the current dataset.
  * **Join Condition**: Currently, only `equals` is supported.
  * **Source Dataset Column**: Select the column from the source dataset.

Click **Import** to import the columns from the source dataset.