This book, "SQL Query Design Patterns and Best Practices," provides a thorough and practical exploration of SQL query techniques that focus on efficiency, clarity, and maintainability. By learning and applying the patterns and methodologies outlined in this guide, readers will enhance their ability to solve complex data problems, optimize query performance, and work effectively with modern data platforms. What this Book will help me do Learn how to write efficient SQL queries by optimizing result sets, enabling better handling of large datasets. Master advanced SQL techniques, including the use of common table expressions and window functions for solving real-world challenges. Gain insights into query optimization with tools like query execution plans and indexes to boost database performance. Understand the interaction of modern data types such as JSON and their integration in SQL workflows. Organize and document SQL queries effectively using tools such as Jupyter notebooks for collaborative and reproducible work. Author(s) The authors of this book are seasoned SQL professionals with rich experience in database management and optimization. Steven Hughes, Ram Babu Singh, Shabbir Mala, and others bring their deep knowledge in SQL query practices and real-world problem-solving to this guide. With a commitment to helping readers harness the power of SQL, the authors have crafted content that is both technically robust and approachable for learners. Who is it for? This book is designed for SQL practitioners ranging from beginners to intermediate levels, including SQL developers, data analysts, and database enthusiasts. If you aim to refine your SQL skills, optimize query designs, and tackle complex data challenges, this book will serve as your reliable companion. Novice readers will quickly build a strong foundation, while experienced professionals will find valuable techniques to enhance their workflow.