# ClickHouse

ClickHouse is an open-source column-oriented database management system designed for high-speed online analytical processing (OLAP) and data warehousing, capable of processing petabytes of data in real-time.

## Prerequisites

* Get ClickHouse database connection parameters from the database owner.
* Refer to IP allowlist to add IP addresses of Lowcoder to your allowlist (if needed).

## Connect to ClickHouse data source

Follow the steps below:

1. Create a new data source in two ways. Note that this permission is restricted to workspace admins and developers.
   * Navigate to the **Data Sources** tab on [Lowcoder Homepage](https://Lowcoder.dev) and click **New data source**.
   * When creating a new query in the app editor, click **+ New** > **+ New data source**.
2. Select **Database** > **ClickHouse** as the data source type.
3. Set its name and configure general settings, including host, port, and database name. You can also set the user name and a password.
4. (Optional) Click **Test connection** to check whether the new data source is successfully connected.
5. Click **Save**, and it will be saved to your data source library.


---

# 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.lowcoder.cloud/lowcoder-documentation/connect-your-data/data-sources-in-lowcoder/bigdata-and-olap/clickhouse.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.