> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/tools/enterprise/control-center/gg8/queries.md).

# Queries

The Control Center Queries screen for GridGain 8 and Apache Ignite 2 clusters.

This section describes the Queries screen. Its layout and functionality changes between the GridGain 8 (Apache Ignite 2) and GridGain 9 clusters.

{% hint style="info" %}
Depending on configuration, [secured clusters](/docs/tools/enterprise/control-center/gg8/authorization-permissions.md) might require a cluster-level authentication for some (or all) of the actions.
{% endhint %}

{% content-ref url="/pages/0utsCrf61n8uikCAuC5w" %}
[Queries Screen](/docs/tools/enterprise/control-center/gg8/queries/querying.md)
{% endcontent-ref %}

{% content-ref url="/pages/v7Oj6FyQt4akWNw2sNJG" %}
[Debugging Running SQL Queries](/docs/tools/enterprise/control-center/gg8/queries/long-running.md)
{% endcontent-ref %}