Build a Secure PostgreSQL AI Agent with LangChain + Ollama

🚀 Introduction Imagine asking your database: “Show me the top 10 customers by revenue.” …and instantly getting results without writing a single SQL query. That’s exactly what an AI-powered database agent can do. In this tutorial, we’ll build a secure PostgreSQL AI Agent using: 🧩 LangChain for agent orchestration 🦙 Ollama for running local LLMs 🐘 PostgreSQL as the database 🛡️ A custom SQL safety layer to block destructive queries By the end, you’ll have a local AI assistant capable of conver