> ## Documentation Index
> Fetch the complete documentation index at: https://agno-v2-studio-tools-doc.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# ClickHouse

## Code

```python cookbook/08_knowledge/vector_db/clickhouse_db/clickhouse.py theme={null}
from agno.agent import Agent
from agno.knowledge.knowledge import Knowledge
from agno.vectordb.clickhouse import Clickhouse

vector_db = Clickhouse(
    table_name="recipe_documents",
    host="localhost",
    port=8123,
    username="ai",
    password="ai",
)

knowledge = Knowledge(
    name="My Clickhouse Knowledge Base",
    description="This is a knowledge base that uses a Clickhouse DB",
    vector_db=vector_db,
)

knowledge.insert(
    name="Recipes",
    url="https://agno-public.s3.amazonaws.com/recipes/ThaiRecipes.pdf",
    metadata={"doc_type": "recipe_book"},
)

agent = Agent(
    knowledge=knowledge,
    search_knowledge=True,
    read_chat_history=True,
)

agent.print_response("How do I make pad thai?", markdown=True)

vector_db.delete_by_name("Recipes")
# or
vector_db.delete_by_metadata({"doc_type": "recipe_book"})
```

## Usage

<Steps>
  <Snippet file="create-venv-step.mdx" />

  <Step title="Install dependencies">
    ```bash theme={null}
    uv pip install -U clickhouse-connect pypdf openai agno
    ```
  </Step>

  <Step title="Run ClickHouse">
    ```bash theme={null}
    docker run -d \
    -e CLICKHOUSE_DB=ai \
    -e CLICKHOUSE_USER=ai \
    -e CLICKHOUSE_PASSWORD=ai \
    -e CLICKHOUSE_DEFAULT_ACCESS_MANAGEMENT=1 \
    -v clickhouse_data:/var/lib/clickhouse/ \
    -v clickhouse_log:/var/log/clickhouse-server/ \
    -p 8123:8123 \
    -p 9000:9000 \
    --ulimit nofile=262144:262144 \
    --name clickhouse-server \
    clickhouse/clickhouse-server
    ```
  </Step>

  <Step title="Set environment variables">
    ```bash theme={null}
    export CLICKHOUSE_HOST="localhost"
    export CLICKHOUSE_PORT="8123"
    export CLICKHOUSE_USER="ai"
    export CLICKHOUSE_PASSWORD="ai"
    export CLICKHOUSE_DB="ai"
    export OPENAI_API_KEY=xxx
    ```
  </Step>

  <Step title="Run Agent">
    ```bash theme={null}
    python cookbook/08_knowledge/vector_db/clickhouse_db/clickhouse.py
    ```
  </Step>
</Steps>