Sql Server2005 4个排名函数: RANK(),DENSE_RANK(),ROW_NUMBER(),NTILE() --演示例题，建一个table create table rankorder( orderid int, qty int ) go --插入数据 insert rankorder values(30,10) insert rankorder values(10,10) insert rankorder values(80,10) insert rankorder values(40,10) insert rankorder values(30,15) insert rankorder values(30,20) insert rankorder values(22,20) insert rankorder values(21,20) insert rankorder values(10,30) insert rankorder values(30,30) insert rankorder values(40,40) go --查询出各类排名 SELECT orderid,qty, ROW_NUMBER() OVER(ORDER BY qty) AS rownumber, RANK() OVER(ORDER BY qty) AS [rank], DENSE_RANK() OVER(ORDER BY qty) AS denserank , NTILE(3) OVER(ORDER BY qty) AS [NTILE] FROM rankorder ORDER BY qty
--结果 --ROW_NUMBER()是按qty由小到大逐一排名，不并列，排名连续 --RANK()是按qty由小到大逐一排名，并列，排名不连续 --DENSE_
