ORA-00904无效的标识符

Question

我有我的查询......

问题

此之一工作：

  select name, bday, address, dbms_random.value(1, 100) as joker
    from employee 
order by joker asc

但是，当我试图让我想用什么要么“其中”和组/ HAVING子句中，我得到一个ORA-00904（无效的）错误..

e.g。

  select name, bday, address, dbms_random.value(1, 100) as joker 
    from employee 
   where joker>5 
order by joker asc

  select name, bday, address, dbms_random.value(1, 100) as joker
    from employee 
group by name, bday, address 
  having joker > 5 
order by joker asc 

还有什么比这里是我的问题，我怎么可以查询使用百搭列？

Answer 1

尝试：

Select * from
(select name, bday, address, dbms_random.value(1, 100) as joker 
from employee)
where joker>5 
order by joker asc