> For the complete documentation index, see [llms.txt](https://docs.fractalworks.io/joule/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fractalworks.io/joule/developer-guides/api-endpoints/sql-support.md).

# SQL support

## Overview

Joule ships with an embedded in-memory modern SQL engine, [DuckDB](https://duckdb.org). This is used to capture events flowing through the processing pipeline along with supporting the metrics engine implementation.

### Key Features

* [Event tap](/joule/components/processors/event-tap.md) for event capture and storage
* [Metrics engine](/joule/components/analytics/metrics-engine.md) to provide SQL analytics
* Data access via the [Rest API](/joule/developer-guides/api-endpoints/data-access-api.md)