Rating: 
Summary: Excellent, comprehensive coverage of SQL
Review: We been looking for a book that covered in detail all the SQL comands. We looked at every SQL book out there, and found SQL Unleashed to be the most comprehensive and detailed with plenty of examples.It paid for itself many times over the first day. For example, try finding in other books how to handle division by zero in your SQL. It had a complete explantion with examples. Overall, a comprehensive reference guide that you will find using over and over.
Rating: 
Summary: Poor testing of sample code and text
Review: While the book does a good job of covering the concepts and design of SQL the numerous code examples contain errors ranging from comments not commented out correctly to erroneous code that causes program halts or crashes. Some of the example code refered to in the book is missing from the CD-ROM. All this makes it difficult for a novice attempting to learn SQL. More advanced users should have no problem. I chose not to use it as the primary or supplementary text for the graduate class I teach on DB programming. Knowing Hans work and the the quality of Sams I was disappointed by both. A better book is The Practical Sql Handbook (ISBN 0201447878) which is the one I opted to use for class.
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