A SQL Cheat Sheet is a quick reference guide that summarizes essential SQL commands and concepts used for working with databases. It typically includes queries for data retrieval (SELECT), filtering (WHERE), sorting (ORDER BY), joins, aggregations (GROUP BY), and data manipulation (INSERT, UPDATE, DELETE). Designed for both beginners and experienced users, it helps in quickly recalling syntax, functions, and best practices, making it easier to write efficient queries and manage databases effectively.