http://www.cnblogs.com/studyzy/archive/2008/11/24/1339772.html
http://blog.csdn.net/dba_huangzj/article/details/49735941
http://www.cnblogs.com/double-K/archive/2016/06/02/5538249.html
sqlserver 优化相关
原文：http://www.cnblogs.com/mingl12/p/5812594.html
