# SQL Studio

The Lenses SQL Snapshot engine accesses the data at the point in time the query is executed. This means, that for Apache Kafka, data added just after the query was initiated will not be processed.

Typical use cases are but are not limited to:

* Identifying a specific message.
* Identifying a particular transaction of payment that your system has processed
* Identifying all thermostats readings for a specific customer if you are working for an energy provider
* Counting transactions processed within a given time window.

{% hint style="info" %}
The Snapshot engine presents a familiar SQL interface, but remember that it queries Kafka with no indexes. Use Kafka's metadata (partition, offset, timestamp) to improve query performance.
{% endhint %}

## Global Studio

To write queries from HQ, select the SQL icon from the left hand side bar. From here you can search for topics across the environments. 

Selecting a topic will automatically fire a query to show you the latest data in the topic (default to limit 10 records).

Each tab can be:

1. renamed
2. clone
3. closed

<figure><img src="/files/n3Ns5ajwITGDPCuV93QL" alt=""><figcaption></figcaption></figure>

By selecting the ellispe (three dots) in the results grid you can further filter and perform actions on the resultset

{% hint style="success" %}
This is based on the data returned by the query in the grid. To filter on the backend of Lenses adjust the SQL Statement.
{% endhint %}

<figure><img src="/files/yd3CADRMLxEau30XRKGr" alt=""><figcaption></figcaption></figure>

## Consumer Groups

SQL Studio also allows you to view consumer groups, select the ellipse (three dots) next to the topic and select `View Consumers`  to open the consumer groups tab for that topic. From there you can filter the grid and perform actions on the consumer groups, for example reset the offsets to a particular time.

<figure><img src="/files/K5VkX5ob6fH2zoCOsL8W" alt=""><figcaption><p>Vie consumer groups in studioo=</p></figcaption></figure>

## Comparing data between environments

To compare data, clone the tab left or right and change the environment connection in the tab.

<figure><img src="/files/MDf5fnPM2mbCSjtkEIHH" alt=""><figcaption></figcaption></figure>

## Agent Studio

To write queries at the agent level. Go to **Environments->\[Your Environment]->Workspace->Sql Studio**, enter your query, and click run.


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

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

```
GET https://docs.lenses.io/latest/devx/6.0/user-guide/sql-studio.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
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.