代码如下:–合并重复行 select * from A union select * from B –不合并重复行 select * from A union all select * from B 按某个字段排序 –合并重复行 select * from ( select * from A union select * from B) AS T order by 字段名 –不合并重复行 select * from ( select * from A union all select * fro