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Natural Language Database Queries with Dual-Agent AI & PostgreSQL Integration

by Paul•Updated: Last update 2 months ago•Source: n8n.io
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Getting Started

AI Database Assistant with Smart Query's & PostgreSQL Integration

Description:

šŸš€ Transform Your Database into an Intelligent AI Assistant

This workflow creates a smart database assistant that safely handles natural language queries without crashing your system. Features dual-agent architecture with built-in query limits and PostgreSQL optimization – perfect for commercial applications!

āœ… Ideal for:

  • SaaS developers building database search features šŸ”
  • Database administrators providing safe AI access šŸ›”ļø
  • Business teams needing user-friendly data queries šŸ“Š
  • Anyone wanting ChatGPT-like database interaction šŸ¤–

šŸ”§ How It Works

1ļøāƒ£ User asks a question – "Show me top 10 popular products"
2ļøāƒ£ Main AI Agent – Interprets the request and ensures safety limits
3ļøāƒ£ SQL Sub-Agent – Generates precise PostgreSQL queries
4ļøāƒ£ Database executes – Returns formatted, limited results safely

⚔ Setup Instructions

1ļøāƒ£ Prepare Your Database

  • Ensure PostgreSQL is accessible from n8n
  • Note your table structure and column names
  • Set up database connection credentials

2ļøāƒ£ Customize the Templates

  • Replace [YOUR_TABLE_NAME] with your actual table name
  • Update [YOUR_FIELDS] with your column names
  • Modify examples to match your use case
  • Important : Keep all LIMIT clauses intact!

3ļøāƒ£ Configure the Agents

  • Copy Main Agent system message to your primary AI node
  • Copy Sub-Agent system message to your SQL generator node
  • Connect the sub-workflow between both agents

4ļøāƒ£ Test & Deploy

  • Test with sample queries like "Show me 5 recent items"
  • Verify query limits work (max 50 results)
  • Deploy and monitor performance

šŸŽÆ Why Use This Workflow?

āœ”ļø System Protection – Built-in limits prevent crashes from large queries
āœ”ļø Natural Language – Users ask questions in plain English
āœ”ļø Commercial Ready – Generic templates work with any database
āœ”ļø Dual-Agent Safety – Smart interpretation + precise SQL generation
āœ”ļø PostgreSQL Optimized – Handles complex schemas and data types

🚨 Critical Features

  • Query Limits : Default 10, maximum 50 results (can be modified)
  • Error Prevention : No unlimited data retrieval
  • Smart Routing : Natural language → Safe SQL → Formatted results
  • Customizable : Works with any PostgreSQL database schema

šŸ”— Start building your AI database assistant today – safe, smart, and scalable!