# Event tap

## Overview

Joule allows you to tap into an event stream and load it into an in-memory database, making the data accessible in SQL format.

## Uses

There are various uses for this filter such as:

1. <mark style="color:green;">**In financial services**</mark>\
   Enables offline analytics and when combined with transaction data, supports in-depth risk analysis and fraud detection.
2. <mark style="color:green;">**In logistics**</mark>\
   Build curated datasets by regularly exporting shipment and inventory data, allowing for historical analysis and performance tracking.
3. <mark style="color:green;">**In manufacturing**</mark>\
   Capture processed events to validate processing and provide lineage, ensuring compliance with industry regulations and improving quality control measures.

{% hint style="info" %}
See how the [Joule REST API](/joule/components/connectors/sources/rest-endpoints.md) can provide data exporting and query features.
{% endhint %}

## Accessing the Tap

<table data-card-size="large" data-view="cards"><thead><tr><th></th><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><mark style="color:orange;"><strong>Anatomy of a Tap</strong></mark></td><td>Construction of a Tap</td><td></td><td><a href="/pages/UnbJimBCkuwYNhjTYYrY">/pages/UnbJimBCkuwYNhjTYYrY</a></td></tr><tr><td><mark style="color:orange;"><strong>SQL Queries</strong></mark></td><td>Use SQL queries to access the data in the store</td><td></td><td><a href="/pages/wTuTKPgFuqHhQnurBnxX">/pages/wTuTKPgFuqHhQnurBnxX</a></td></tr></tbody></table>


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# Agent Instructions: Querying This Documentation

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Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.fractalworks.io/joule/components/processors/event-tap.md?ask=<question>
```

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The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.