rows & range
https://msdn.microsoft.com/zh-cn/library/ms189461.aspx
http://www.sqlpassion.at/archive/2015/01/22/sql-server-windowing-functions-rows-vs-range/
rows & range
https://msdn.microsoft.com/zh-cn/library/ms189461.aspx
http://www.sqlpassion.at/archive/2015/01/22/sql-server-windowing-functions-rows-vs-range/