select Department_No as departmentNo,ROW_NUMBER()

OVER(ORDER BY Department_No) AS rowNumber into

#depTemp--建立临时表
from departments

declare @max int
--用来获得最大的rowNumber
select @max=max(rownumber)
from #depTemp

declare @rowNo int
set @rowNo=1
while @rowNo<=@max
--用来对每一个rowNumber来进行循环操作
begin
--此处对每一行要进行的操作的代码
set @rowNo=@rowNo+1
end
drop table #depTemp--清除临时表