Build a Secure PostgreSQL AI Agent with LangChain + Ollama

Short summary

Tutorial on building an AI agent that converts natural language to SQL queries using LangChain, Ollama, and PostgreSQL. Includes SQL safety validation blocking destructive operations while enabling reads. Provides complete Python code for local deployment without API costs.

• •LangChain + Ollama + PostgreSQL create a conversational SQL assistant
• •SQL safety layer blocks INSERT/UPDATE/DELETE/DROP while allowing SELECT queries
• •Complete local deployment with no external API costs or dependencies

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