ROW_NUMBER() OVER的使用

该例子来自csdn论坛，看完这个例子就明白这个函数的用法了

select *,row_number() over(order by productname) as rownumber
from products
--上面是正确的,然后我想的是从这个结果集在取10-20之间的数据,然后我书写如下:
select *,row_number() over(order by productname) as rownumber
from products
where rownumber between 10 and 20
--这样报错.然后又找资料看,找不个例子.然后我照那个例子改进
select* from
(select *,row_number() over(order by productname) as rownumber
from products)
as temp
where rownumber between 10 and 20
--这样就对了.