mysql入门很简单源码，全部都是sql语句-mysql code，this is the book code. all the file is sql words.

MySQL是一种关系数据库管理系统，关系数据库将数据保存在不同的表中，而不是将所有数据放在一个大仓库内，这样就增加了速度并提高了灵活性。我们为大家收集整理了关于MySQL数据库入门教程，以方便大家参考。(MySQL is a relational database management system in which relational databases store data in different tables instead of putting all the data in a l

SQL优化文档，是比较经典的sql优化的入门文档，文中的内容比较适合初学者认知。(SQL optimizes the document, is the classic SQL optimization introductory document, the content in this article is more suitable for the beginner cognition.)

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)