[How to: deal with large databases](https://python.langchain.com/docs/how_to/sql_large_db): LLM should read this page when dealing with large databases in SQL question-answering, identifying relevant table schemas to include in prompts, and handling high-cardinality columns with proper nouns or other unique values. The page discusses methods to identify relevant tables and table schemas to include in prompts when dealing with large databases. It also covers techniques to handle high-cardinality columns containing proper nouns or other unique values, such as creating a vector store of distinct values and querying it to include relevant spellings in prompts.

