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

# Tangent Lake

> Federated Query Lake

<Info>
  Tangent Lake lets you query across multiple databases through a unified, no‑code experience in SyneHQ. Join, analyze, and visualize data from different sources—without ETL.
</Info>

![Tangent Lake](https://pbs.twimg.com/media/Gvw6lUyW0AAwC2w?format=jpg\&name=4096x4096)

## Start here

<CardGroup cols={3}>
  <Card title="Getting Started" icon="rocket" href="/features/tangent-lake/getting-started">
    Create your first Tangent and run a federated SQL query
  </Card>

  <Card title="How It Works" icon="server" href="/features/tangent-lake/how-it-works">
    DuckDB under the hood, ATTACH, and federated orchestration
  </Card>

  <Card title="Examples" icon="code" href="/features/tangent-lake/examples">
    Ready-to-run SQL examples for cross‑database joins
  </Card>
</CardGroup>

<CardGroup cols={2}>
  <Card title="FAQ" icon="question" href="/features/tangent-lake/faq">
    Common questions, limits, and best practices
  </Card>

  <Card title="Connections" icon="plug" href="/get-started/data-sources">
    Ensure your sources are connected and ready
  </Card>
</CardGroup>

## Why Tangent Lake

* **No ETL**: Query live data across engines without moving it
* **Cross‑engine joins**: Postgres + MySQL + SQLite + DuckDB files
* **Faster analysis**: One console, one SQL query, unified results
* **Governed access**: Reuse connections with RBAC and auditing

<Note>
  Prefer UI? Use Browse & Query in the console. Prefer code? Use the SQL console to see generated SQL and results side‑by‑side.
</Note>


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