按表名排序？

Question

有没有办法在表名上使用“order”功能。即我希望将两个表合并，然后按一列排序，然后按表名排序。

Answer 1

将常量添加到描述表名的列列表中，例如

select *, 'TableA' as TableName
from TableA
union all
select *, 'TableB' as TableName
from TableB
order by TableName

Answer 2

您可以创建一个单独的列（假设您的列为col1和col2）

select col1,col2,table_1 as table_name
from table_1
union
select col1,col2,table_2 as table_name
from table_2
order by col1,table_name;