# Preview sample data

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The Preview feature is **opt-in** because displaying sample data egresses data from your table. Decube **does not cache sample data** from this preview.
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To view sample data for a specific table, go to the table in the Catalog and open the **Preview** tab.

The platform displays 10 rows of sample data from your table. Any columns marked as *PII* or *Sensitive* in the [Schema tab](https://docs.decube.io/catalog/add-tags-and-classifications-to-fields) are automatically masked, preventing sensitive data from being exposed to other organization members.

To run the preview, select **Accept** under the disclaimer.

{% hint style="info" %}
To run the preview, you will need access to "Allow run preview" for the data source selected. [Learn about source-based policies.](https://docs.decube.io/group-access-policies/source-based-policies)
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<figure><img src="https://1779874722-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTw0qpCVzfrIXqS4FEg4T%2Fuploads%2Fgit-blob-777db4652c7c774cf1a5b2aea6a86127af384c0e%2Fpreview%20page.png?alt=media" alt=""><figcaption><p>Example of sample data that is displayed.</p></figcaption></figure>