This book introduces a relatively new approach to mastering one's Oracle SQL skills. This book will teach you how to leverage your existing Oracle SQL knowledge as well as how you can benefit from a variety of SQL tricks and techniques we present thereafter. This is a text book rather than a reference, and it aims to teach you how to become a better SQL specialist. Even though the recommendations found in this book may be applied to a variety of SQL flavors, Oracle SQL is the main subject of this book. Our goal was not to impress you with clever tricks and sophisticated techniques, but rather give you a roadmap to excellence in writing Oracle SQL queries. No doubt, this book presents tricks and classy approaches, which still serve the main goal - to let you master your Oracle SQL skills.