|M| 求SQL语句 多表进行合并

[zyciis628]

表A
ID name Address
1 Jerry GuanZhuo
表B
ID Name Address
1 Joy ShanHai

表C
OrderID Name
1 Jerry
2 Joy

因为系统有两个用户表和一个订单表设计的很不好的,但现在要查询出订单表中他们的地址结果为

OrderID Name ID Address
1 Jerry 1 GuanZhuo
2 Joy 1 ShanHai

谢谢

[zyciis628]

也就是说要表A和表B的数据相结合再和表C用Name来关联起来

谢谢

[dawugui]

select c.* , t.id , t.address
from c left join (select * from a union all select * from b) t
on c.name = t.name

[liangCK]

select a.*,b.id,b.address
from 表C a,
(select name,address from 表A union all select name,address from 表B) b
where a.name=b.name

[昵称被占用了]

select c.*,
isnull(a.id,b.id) as id,
isnull(a.Address,b.Address ) as Address 
from c left join a on c.name=a.name
left join b on c.name=b.name

[liangCK]

select a.*,b.id,b.address 
from 表C a, 
(select id,name,address from 表A union all select id,name,address from 表B) b 
where a.name=b.name 

[dawugui]

create table A(ID int,name varchar(10),Address varchar(10))
insert into A values(1, 'Jerry', 'GuanZhuo' )
create table B(ID int,name varchar(10),Address varchar(10))
insert into B values(1, 'Joy', 'ShanHai ' )
create table c(OrderID int,Name varchar(10))
insert into c values(1, 'Jerry') 
insert into c values(2, 'Joy') 
go

select c.* , t.id , t.address
from c left join (select * from a union all select * from b) t
on c.name = t.name

drop table a,b,c

/*
OrderID     Name       id          address
----------- ---------- ----------- ----------
1           Jerry      1           GuanZhuo
2           Joy        1           ShanHai 

(2 行受影响)
*/

[hpx021131]

老乌龟果然是老乌龟

速度快。 呵呵...