A Visual Introduction to SQL Upplaga 2

Learn SQL quickly with this easy-to-use, visual tutorial Every IT professional needs at least a basic understanding of SQL. A Visual Introduction to SQL, Second Edition provides a unique tool for acquiring this knowledge. By diagramming each query, this book resolves the language’s apparent complexity into simple clarity using an intuitive visual representation. Rather than focusing on a specific vendor’s SQL dialect, the book introduces the essential core of the language, making it useful for anyone. For this new edition of their successful, long-selling book, David Chappell and J. Harvey Trimble Jr. have updated the contents to reflect SQL today. The result is a clear, step-by-step explanation of the current language, with the book’s unique visual approach guiding the way. A Visual Introduction to SQL, Second Edition is useful for all levels: For SQL beginners, the unique graphical approach makes learning this sometimes unfriendly language much easier For those with some SQL experience, the visual approach makes clear the language’s underlying structure and helps in creating complex queries For regular SQL users, the wealth of examples in this book provides quick, easy-to-reference answers to frequently asked questions No matter what SQL version you use, A Visual Introduction to SQL, Second Edition allows you to quickly grasp both the basic and more advanced features of this important language.