日期:2014-05-18  浏览次数:20442 次

sql问题~~`

CREATE   TABLE   [A]   (
[id]   [bigint]   NOT   NULL   ,
[id1]   [int]   NULL   ,
    [id2]   [int]   NULL   ,
)   ON   [PRIMARY]
GO
CREATE   TABLE   [B]   (
[id]   [bigint]   NOT   NULL   ,
[id1]   [int]   NULL   ,
                    [id2]   [int]   NULL   ,
)   ON   [PRIMARY]
GO

insert     into   A   values( '1 ', '1 ', '0 '   )
insert     into   A   values( '2 ', '2 ', '0 '   )
insert     into   A   values( '3 ', '3 ', '0 '   )

insert     into   B   values( '1 ', '1 ', '3 '   )
insert     into   B   values( '2 ', '2 ', '2 '   )
insert     into   B   values( '3 ', '3 ', '1 '   )

两表的关系是   A.id=B.id2

select   *   from   A   left   join   B   on   A.id=B.id2
能得到这个:
id id1 id2             id id1         id2
-------------------------------------------------
1 1 0 3 3 1
2 2 0 2 2 2
3 3 0 1 1 3


我却想要这样的:

id id1 id2
----------------------
1 1 0       (A表)
3 3 1         (B表)
2 2 0       (A表)
2 2 2         (B表)
3 3 0       (A表)
1 1 3       (B表)

上周没有解决   现在在线求教~   没有分了     实在对不起~

drop   table   A
drop   table   B


------解决方案--------------------

select id,id1,id2 from (
select id as f,* ,1 as c from A
union
select id2 as f,* ,2 as c from B) a
order by a.f,c