I Built a Natural Language to SQL Generator with LangChain, Groq, and Streamlit

TL;DR: I built an app where you type "Show me the top 5 customers by spending" and it writes the SQL, runs it against a real database, shows you the results in a table, and explains what they mean - all powered by a free LLM. This is the full tutorial. The Problem This Solves Most people who need data don't know SQL. They know the question they want answered - "which products are selling the most?", "which customers haven't ordered in 3 months?" - but they can't translate it into a query. Text-to-SQL bridges that gap.