DB2查询将月数从1到12作为12行

DB2查询将月数从1到12作为12行

我希望结果如下

1. 2. 3. 4. 5. 6. 7. 8. 9 10 11 12 请务必让我知道您的想法。

WITH子句允许您定义要从中选择的表。可以执行以下操作：

with dummy(id) as (
    select 1 from SYSIBM.SYSDUMMY1    
    union all
    select id + 1 from dummy where id < 12
)
select id from dummy

---

我假设您在所有模式的所有表中有+12列，您可以这样做：

select rownumber() over() as mymonth from syscolumns
fetch first 12 rows only

其他方法：

with AllMonth(mymonth) as (
    values (1), (2), (3), (4),(5), (6),(7), (8), (9), (10),(11), (12)
)
select mymonth from AllMonth

with AllMonth(mymonth) as (
Select 1 from SYSIBM.SYSDUMMY1 
union all
Select 2 from SYSIBM.SYSDUMMY1 
union all
Select 3 from SYSIBM.SYSDUMMY1 
union all
Select 4 from SYSIBM.SYSDUMMY1 
union all
Select 5 from SYSIBM.SYSDUMMY1 
union all
Select 6 from SYSIBM.SYSDUMMY1 
union all
Select 7 from SYSIBM.SYSDUMMY1 
union all
Select 8 from SYSIBM.SYSDUMMY1 
union all
Select 9 from SYSIBM.SYSDUMMY1 
union all
Select 10 from SYSIBM.SYSDUMMY1 
union all
Select 11 from SYSIBM.SYSDUMMY1 
union all
Select 12 from SYSIBM.SYSDUMMY1 
)
select mymonth from AllMonth

或不带：

select mymonth from (
values (1), (2), (3), (4),(5), (6),(7), (8), (9), (10),(11), (12)
) AllMonth(mymonth)

其他方法：

with AllMonth(mymonth) as (
    values (1), (2), (3), (4),(5), (6),(7), (8), (9), (10),(11), (12)
)
select mymonth from AllMonth

with AllMonth(mymonth) as (
Select 1 from SYSIBM.SYSDUMMY1 
union all
Select 2 from SYSIBM.SYSDUMMY1 
union all
Select 3 from SYSIBM.SYSDUMMY1 
union all
Select 4 from SYSIBM.SYSDUMMY1 
union all
Select 5 from SYSIBM.SYSDUMMY1 
union all
Select 6 from SYSIBM.SYSDUMMY1 
union all
Select 7 from SYSIBM.SYSDUMMY1 
union all
Select 8 from SYSIBM.SYSDUMMY1 
union all
Select 9 from SYSIBM.SYSDUMMY1 
union all
Select 10 from SYSIBM.SYSDUMMY1 
union all
Select 11 from SYSIBM.SYSDUMMY1 
union all
Select 12 from SYSIBM.SYSDUMMY1 
)
select mymonth from AllMonth

---

您是如何开始的，您的SELECT语句是什么？你研究过WITH子句吗？WITH子句使用一个表进行迭代，但我没有任何表进行迭代，我只需要从1到12的12行值。动态定义表！