OpenAI Chat with Google BigQuery Data

### 2. AI Agent equipped with the query tool
In order to have more control on the input of the BigQuery node, we don't use the BigQuery tool. Instead we have a set of nodes to retrieve the SQL query, clean it and send it to a BigQuery Node.

#### How to setup?
- **AI Agent with the Chat Model**:
   1. Add a **chat model** with the required credentials *(Example: Open AI 4o-mini)*
   2. Adapt the **name of your BigQuery table** in the system prompt *(Example: transports.shipments)*
   3. Adapt the **tables fields explanation** in the system prompt
  [Learn more about the AI Agent Node]({{ $env.WEBHOOK_URL }}
- Copy and past the **nodes in the yellow sticker** in another workflow. Point the query tool to this workflow.
[Learn more about the Custom n8n Workflow Tool node]({{ $env.WEBHOOK_URL }}