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Natural Language to SQL Generator

Convert plain English into SQL queries and run them securely against a MySQL database using FastAPI and LLMs.

Overview

This solution enables users to generate and execute SQL queries by simply entering natural language questions. Built with FastAPI, SQLAlchemy, and LangChain-integrated Ollama models (like DeepSeek or LLaMA), it dynamically introspects a MySQL schema and converts queries to SQL using prompt templates and a language model. It also executes those SQL queries securely and returns JSON-formatted results, making it ideal for data exploration apps, analytics dashboards, or internal tools.

Technologies

  • Automates SQL generation from user-friendly natural language inputs
  • Supports real-time schema introspection from a MySQL database
  • Enables seamless execution and retrieval of query results
  • Uses LLMs like DeepSeek via Ollama for high-accuracy SQL translation
  • Exposes clean REST APIs for easy integration with frontend apps

Key Features

Natural Language to SQL Translation

Converts user questions into SQL statements using LangChain prompt templates and an Ollama-hosted LLM.

Dynamic Schema Extraction

Automatically extracts database schema from MySQL using SQLAlchemy's inspection tools.

SQL Execution API

Runs raw SQL queries and returns results in JSON format through FastAPI endpoints.

CORS-Enabled API Server

Supports cross-origin requests, enabling integration with any frontend.

Prompt Engineering for SQL-Only Output

Uses a strict prompt template to ensure the language model returns only valid SQL syntax without explanations.

Common Use Cases

Internal BI Tooling

Enable business teams to explore database insights using plain English instead of writing SQL.

AI-Powered Dashboards

Integrate into a dashboard application to convert user questions into live queries on backend databases.

Data Exploration for Analysts

Let analysts query data more freely without needing to know SQL syntax.

Frontend-Backend Prototyping

Use this API as a backend engine to prototype data-driven applications quickly.

Ready to transform your business?

Let's discuss how our natural language to sql generator solutions can help you overcome challenges and achieve your business objectives.