SQL Essentials provides practical information about SQL for readers of all levels - from novice to advanced, with coverage that shows comparisons between Oracle, Microsoft SQL Server, Microsoft Access, and MySQL. It is intended for use in a course that is covering just SQL with a few design concepts, so for this situation we have included a small appendix covering the principles of database design. This book is well suited as a supplemental book in a database theory course. A CD ROM disk is included with this book. It contains the Lyric database used throughout the book in various formats.