SELECT * FROM s.employees WHERE employeeid IN(SELECT employeeid FROM s.tax WHERE ROWNUM<=6 ORDER BY tax DESC)
不知道错在哪了？
------解决方案--------------------
--试下这个,这种写法不好,可用exists代替的,还有rownum是先生成,后排序,因此你排序后选rownum<=6
--和没排选一样的,没有任何作用
select * from s.employees where employeeid in
(select employeeid from (select employeeid from s.tax order by tax desc)
where rownum<=6);