这本书是全美经典学习指导系列中的《SQL编程习题与解答》的影印版，如果想要学习ＳＱＬ语言的话，是本很不错的参考学习资料。-This book is a photocopy version of the nation' s classic study guide series in SQL programming exercises and answers " If you want to learn the SQL language is a very good reference for learning materials.