# Query for Database Classes

## Introduction

The class `ClrClass` can be used to retrieve the classes in the database.

## Getting All Classes

For example, if the goal is to get all the classes in the database, a query like this would be used in the Starcounter Administrator which is found at `http://localhost:8181/#/databases/default/sql` when Starcounter is running:

```sql
SELECT * FROM ClrClass
```

This would give back all the classes, including the built-in ones.

## Getting User-Created Classes

To get the user-created classes, use this query:

```sql
SELECT *
FROM ClrClass c
WHERE c.Updatable=true
AND c.UniqueIdentifier NOT LIKE 'Simplified%'
AND c.UniqueIdentifier NOT LIKE 'Concepts.Ring%'
AND c.UniqueIdentifier NOT LIKE 'Starcounter.%'
AND c.UniqueIdentifier NOT LIKE 'SocietyObjects%'
```

For example, if the query is run after following the steps in [part one](/2.3.1/tutorial/create-a-database-class.md) of the tutorial, it should look like this:

![](/files/-L7x9Pxg8V2xEJ-r0jmg)


---

# 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.starcounter.io/2.3.1/guides/sql/query-for-database-tables.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.