oralce 下，列名有特殊符号的sql 如何编写？
在 sql server 下 
语句为 
 select 100 as a-b 的语句
只要改成 
select 100 as [a-b]
就可以正常运行，
但是在 oracle 下 
select 100 as a-b from dual 如何更改才能正常运行？
select 100 as [a-b] from dual 这个不行。

------解决方案--------------------
select 100 as "a-b" from dual;
------解决方案--------------------

SQL code

select 100 as "a-b" from dual;