mysql数据库如何创建索引
http://jingyan.baidu.com/article/da1091fbd166ff027849d687.html
MySQL性能优化的最佳20+条经验
http://www.imooc.com/article/1150
mysql索引的使用傻瓜教程
http://www.php100.com/html/webkaifa/database/Mysql/2013/0316/12223.html
http://jingyan.baidu.com/article/da1091fbd166ff027849d687.html
http://www.imooc.com/article/1150
http://www.php100.com/html/webkaifa/database/Mysql/2013/0316/12223.html