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...