> For the complete documentation index, see [llms.txt](https://docs-v3.toucantoco.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs-v3.toucantoco.com/tutorials/advanced-tutorials/embed-a-story-with-user-attributes/dynamic-database.md).

# Dynamic Database

Expanding upon dynamic queries, it's also possible to dynamically select the database itself, guided by user attributes. This approach allows for a more personalized and efficient data handling strategy, tailored to the specific needs and contexts of individual users.

**How to Implement:**

1. Create a new dataset
2. Select "Several databases through variables" option
3. Integrate the user attribute condition by substituting the placeholder with your desired attribute.

Consider the example below for incorporating a database attribute directly into your query:

```python
{{ (user or {}).get('attributes', {}).get('database', 'rdb') }}
```

The example demonstrates how to dynamically select appropriate database. This method leverages conditional logic to either use the `database` attribute or default to `rdb` if the attribute doesn't exist.

{% @arcade/embed url="<https://app.arcade.software/share/ZMIBXRrNp6dau97dmtPG>" flowId="ZMIBXRrNp6dau97dmtPG" %}


---

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