这句sql语句如何错了，答案

这句sql语句怎么错了，在线等答案
select *,(Row_Number() over(order by id)) as rownum from R_ExamOptions where 1=1 and rownum=3

报错：rownum无效

------解决方案--------------------

SQL code

select * from(select *,(Row_Number() over(order by id)) as rownum from R_ExamOptions)twhere 1=1 and rownum=3