"SQL step by step" is a practical guide for those who want to master the language of SQL queries quickly and efficiently. This book allows the reader to learn step-by-step the basic concepts and functions of SQL, from simple queries to complex database operations. The authors explain complex topics in simple terms, which makes the course understandable and accessible even for beginners. With this book, readers will be able to learn how to create databases, run queries, update data, and analyze it. "SQL step by step" will be a reliable assistant for those interested in data analysis or working with databases.