# ClickHouse

> [ClickHouse](https://clickhouse.com/) is the fast and resource efficient open-source database for real-time 
> apps and analytics with full SQL support and a wide range of functions to assist users in writing analytical queries. 
> It has data structures and distance search functions (like `L2Distance`) as well as 
> [approximate nearest neighbor search indexes](https://clickhouse.com/docs/en/engines/table-engines/mergetree-family/annindexes) 
> That enables ClickHouse to be used as a high performance and scalable vector database to store and search vectors with SQL.


## Installation and Setup

We need to install `clickhouse-connect` python package.

```bash
pip install clickhouse-connect
```

## Vector Store

See a [usage example](/docs/integrations/vectorstores/clickhouse).

```python
from langchain.vectorstores import Clickhouse, ClickhouseSettings
```