> For the complete documentation index, see [llms.txt](https://upsolver.gitbook.io/content/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://upsolver.gitbook.io/content/reference-1/sql-commands/connections/create-connection/clickhouse.md).

# ClickHouse

A ClickHouse connection is used to support exporting/loading data from your Upsolver tables into ClickHouse. 

## Syntax

```sql
CREATE CLICKHOUSE <connection_identifier> 
    CONNECTION_STRING = '<connection_string>' 
    USER_NAME = '<user_name>'
    PASSWORD = '<password>' 
    [ COMMENT = '<comment>' ]
```

#### Jump to

* [`CONNECTION_STRING`](#connection_string-editable)
* [`USER_NAME`](#user_name-editable-with-password)
* [`PASSWORD`](#password-editable-with-user_name)
* [`COMMENT`](#comment-editable)

## Connection options

#### `CONNECTION_STRING` — editable

Type: `text`

The connection string to use when connecting to ClickHouse. Syntax should be as follows:

`protocol://host[:port][/database][?param[=value][&param[=value]][#tag[,tag]]`

The ClickHouse documentation for creating a connection string can be found [here](https://clickhouse.com/docs/en/integrations/java#connect-to-clickhouse).

#### `USER_NAME` — editable

Type: `text`

The user for authenticating to the database.

#### `PASSWORD` — editable

Type: `text`

The password to use for authentication.&#x20;

#### `COMMENT` — editable

Type: `text`

(Optional) A description or comment regarding this connection.

## &#x20;Example

```sql
CREATE CLICKHOUSE CONNECTION my_clickhouse_connection
    CONNECTION_STRING = 'http://<host_name>:8123/<db_name>'
    USER_NAME = 'your username'
    PASSWORD = 'your password';
```


---

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