> For the complete documentation index, see [llms.txt](https://docs.flopsar.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.flopsar.com/7/user-guide/observing-and-diagnosing/data-correlation.md).

# Data Correlation

Data Correlation groups recorded invocations that share a parameter value — for example a session id or a business transaction id — so you can follow one logical operation across threads and applications. Open it from **Analytics → Data Correlation**.

{% hint style="info" %}
**Screenshot placeholder:** Workstation → Analytics → Data Correlation. Correlation form (date range and parameter condition) and grouped result rows with span duration.
{% endhint %}

## Query

**Date range** and **Correlation** are required. Correlation is a condition on a captured parameter: a key, a value, or both.

Optional filters:

* **Application** — one monitored application
* **Parameters** — extra key/value conditions, combined with AND

## Results

Rows are invocations. They are grouped by the correlated parameter value; each group shows a span duration from the start of the first invocation to the end of the last. Open a method signature to see its [execution tree](/7/user-guide/observing-and-diagnosing/method-execution-tree.md). Parameter values are available inline without leaving the list (requires **View parameters**).