> ## 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.

# FAQ

> Common questions about Tangent Lake

<AccordionGroup>
  <Accordion title="Do I need to move data into SyneHQ?">
    No. Tangent Lake queries data live from your connected sources. No ETL required.
  </Accordion>

  <Accordion title="What databases are supported?">
    Any source supported by SyneHQ connections can participate: Postgres, MySQL, SQLite, Mongo (via SQL Bridge), and more. See **Data Sources** for the full list.
  </Accordion>

  <Accordion title="Is this secure for production?">
    Yes. All connections follow SyneHQ’s security model (encryption, RBAC, audit logs). For private networks, use **Local Connections** with the Rabbit tunnel.
  </Accordion>

  <Accordion title="How does performance compare to ETL?">
    For exploration and operational analytics, live federation is often faster to iterate. For heavy recurring jobs, materializing subsets can help.
  </Accordion>

  <Accordion title="Can I move data between databases?">
    Yes. DuckDB SQL can copy or create tables across sources when needed—useful for migrations or “pinning” a result set.
  </Accordion>
</AccordionGroup>