http://www.cnblogs.com/iPragmatic/p/4930396.html
http://www.cnblogs.com/nixi8/p/4934009.html
http://www.cnblogs.com/w-wanglei/p/ssql-series3.html
http://www.cnblogs.com/Chuck-wu/p/4928820.html
http://www.cnblogs.com/mindwind/p/4934532.html
原文：http://www.cnblogs.com/chengjun/p/4939325.html