SQL.21日自学通，SQL的自学书籍。全文通俗易懂，从简单的入手，慢慢带着我们进入MYSQL的知识殿堂，由浅及深，很适合初学者。-SQL.21 pass on self-learning, SQL self-study books. The full text of user-friendly, from the simple to start slowly with MYSQL knowledge as we enter the hall, by the shallow and deep,

SQL，讲述了数据库的语法和应用，由浅入深，让你从一个菜鸟成为一个高手。-SQL, the syntax tells the database and applications, Deep let you from a novice to become an expert.

数据库优化和深一步的sql强化,并对设计字段和表设计的具体说明(Database optimization and deep step SQL reinforcement and detailed descr iption of design fields and table designs)

mysql入门到深入，非常好，非常经典。是pdf文档，有需要的朋友可以下载学习(MySQL entry to deep, very good, very classic. It's a PDF document, and a friend in need can download and learn)