Oracle

Question

在 Oracle 中，我想要 select 2 列多行：

示例：

name   Phone
----   -----
John   1234
Mary   4321

这行不通：

select
   'John' as name,
   'Mary' as name,
   '1234' as phone,
   '4321' as phone
from
   dual

Answer 1

合并两个单行查询：

select
   'John' as name,
   '1234' as phone
from
   dual
union all
select
   'Mary' as name,
   '4321' as phone
from
   dual

NAME	PHONE
John	1234
Mary	4321

Oracle - Select 来自 dual 的多个别名行