Mysql 基礎之 索引

轉載自 ：  由淺入深探究mysql索引結構原理、效能分析與最佳化

相關參考 ： 

http://www.cnblogs.com/hustcat/archive/2009/10/28/1591648.html

http://www.cnblogs.com/oldhorse/archive/2009/11/16/1604009.html

http://blog.csdn.net/zuiaituantuan/article/details/5909334

http://www.codinglabs.org/html/theory-of-mysql-index.html

http://isky000.com/database/mysql_order_by_implement

http://dev.mysql.com/doc/refman/5.0/en/server-system-variables.html

http://www.docin.com/p-211669085.html