[this guide](https://python.langchain.com/docs/tutorials/sql_qa/): LLM should read this page when: 1. Building a question-answering system over a SQL database 2. Implementing agents or chains to interact with a SQL database 'This tutorial covers building question-answering systems over SQL databases using LangChain. It demonstrates creating chains and agents that can generate SQL queries from natural language, execute them against a database, and provide natural language responses. It covers techniques like schema exploration, query validation, and handling high-cardinality columns.'

