相关疑难解决方法(0)

可以使用以下命令创建包含一列和一行的表:

select 'create' as col from dual;

这可以用于构建表连接:

with
  a as (select 'create' as ac from dual),
  b as (select 'delete' as bc from dual)
select * from a left outer join b on (ac = bc);

现在我想要两行.我是这样做的:

select 'create' as col from dual
union
select 'delete' as col from dual;

但是有一个更紧凑的符号吗？我试过了

select ('create', 'delete') as col from dual;

但它不起作用.