Question

我在2个不同的数据库中有2个表，并且服务器是相同的。

表1：

ID      Name      Address      date
=======================================
1       abc       123 xyz      1-1-2018

2       efg       456 pqr      1-20-2018

表2：

ID     Name      Address       Date
-----------------------------------
1      abc       xxxx         1-1-2017

2      xjy       yyyy         1-20-2017

我希望两个表的结果都显示如下：

ID     Name     Address       Date
-------------------------------------
1      abc      123 xyz       1-1-2018   This is from table 1

1      abc      xxxx          1-1-2017   This is from table 2

如何在两个表中仅显示id来显示我的结果？

Answer 1

您可以使用union all：

select t.*
from ( (select t1.ID, t1.Name, t1.Address, t1.date
        from table1 t1
        where exists (select 1 from table2 t2 where t2.id = t1.id)
       ) union all
       (select t2.ID, t2.Name, t2.Address, t2.date
        from table2 t2
        where exists (select 1 from table1 t1 where t2.id = t1.id)
       ) 
     ) t;

Answer 2

您可以使用UNION：

select id, [name], address, [date], cast('This is from table 1' as varchar(100))
from table1 where id in (select id from table2)
union
select id, [name], address, [date], cast('This is from table 2' as varchar(100))  
from table2 where id in (select id from table1);

如何在2条不同的线上显示2个不同表的相同结果

2 个答案: