我收到此错误:关键字“选择”附近的语法不正确。
尝试执行此操作时:
Create Tables new_table
Select * , 'XXX1' as XField
From old_table1
UNION ALL
Select * , 'XXX2' as XField
From old_table2
UNION ALL
Select * , 'XXX3' as XField
From old_table3
我尝试了来自stackoverflow的其他建议,这些建议与使用union创建新表有关,但解决方案无效
Create Tables new_table
Select * , 'XXX1' as XField
From old_table1
UNION ALL
Select * , 'XXX2' as XField
From old_table2
UNION ALL
Select * , 'XXX3' as XField
From old_table3
我希望(经过长时间的处理,我使用UNION ALL之后),我的结果将是一个包含所有字段和用户定义字段的新表。
答案 0 :(得分:1)
创建一个view:
create view new_table as
select ...
union all
select ...
etc
答案 1 :(得分:1)
您需要SELECT ... INTO
:
select * into new_table
from (
Select * , 'XXX1' as XField
From old_table1
UNION ALL
Select * , 'XXX2' as XField
From old_table2
UNION ALL
Select * , 'XXX3' as XField
From old_table3
) t;