sql2000实现row_number

一、以PersonID,classid,dt_ClassData为条件进行分组,每个小组加序号，row_number在sql2005中不可用

方法一、sql2000及以上版本
--以PersonID,classid,dt_ClassData为条件进行分组,每组加序号
select ID
      ,(select   count(1)   from    m_LampHistoryDataGet  as  b  
       where  a.dt_ClassData=b.dt_ClassData 
       and a.classid=b.classid
       and a.PersonID=b.PersonID
       and b.id<=a.id  
      )  as  getnum
      ,[PersonID]
      ,[ClassID]
      ,[dt_GetTime]
      ,[dt_ClassData]    
from   m_LampHistoryDataGet as a
order by  PersonID,dt_GetTime
方法二、用于sql2005及以上版本
--以PersonID,classid,dt_ClassData为条件进行分组,每组加序号
select ID
      ,ROW_NUMBER() over(partition by PersonID,classid,dt_ClassData order by id)  as  getnum
      ,[PersonID]
      ,[ClassID]
      ,[dt_GetTime]
      ,[dt_ClassData]
from   m_LampHistoryDataGet as a
order by  PersonID,dt_GetTime

二、 显示结果如下

ID     getnum     PersonID       ClassID       dt_GetTime                dt_ClassData
1	1		6		1		2015-01-15 14:50:03.000		2015-01-15 00:00:00.000
2	2		6		1		2015-01-15 14:50:06.000		2015-01-15 00:00:00.000
3	3		6		1		2015-01-15 14:50:10.000		2015-01-15 00:00:00.000
7	4		6		1		2015-01-15 14:50:51.000		2015-01-15 00:00:00.000
4	1		6		1		2015-01-16 14:50:45.000		2015-01-16 00:00:00.000
5	1		143		1		2015-01-15 14:50:45.000		2015-01-15 00:00:00.000
8	2		143		1		2015-01-15 14:50:51.000		2015-01-15 00:00:00.000
6	1		144		1		2015-01-15 14:50:45.000		2015-01-15 00:00:00.000