需要学习

MySQL索引和查询优化
http://www.cnblogs.com/mailingfeng/archive/2012/09/26/2704344.html



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http://www.oschina.net/question/156709_112566


MySQL事务隔离级别详解

http://xm-king.iteye.com/blog/770721

MySQL索引和查询优化

http://www.cnblogs.com/mailingfeng/archive/2012/09/26/2704344.html