Oracle数据库查询,该如何解决
Oracle数据库查询
表A:A B
A B
表B:C D E
C D E
表C:F G H I
F G H I
怎么查出结果是:
A B C D E F G H I
A B C D E F G H I
------解决方案--------------------
------解决方案--------------------
估计不是楼主楼主的答案。也没有关联关系提供,但也只能迪卡尔
------解决方案--------------------
select x.A,x.B,y.C,y.D,y.E,z.F,z.G,z.I from
(select rownum as num,a.* from a) x,
(select rownum as num,b.* from b) y,
(select rownum as num,c.* from c) z
where x.num=y.num
and y.num=z.num
表A:A B
A B
表B:C D E
C D E
表C:F G H I
F G H I
怎么查出结果是:
A B C D E F G H I
A B C D E F G H I
------解决方案--------------------
select * from A,B,C
------解决方案--------------------
估计不是楼主楼主的答案。也没有关联关系提供,但也只能迪卡尔
------解决方案--------------------
select x.A,x.B,y.C,y.D,y.E,z.F,z.G,z.I from
(select rownum as num,a.* from a) x,
(select rownum as num,b.* from b) y,
(select rownum as num,c.* from c) z
where x.num=y.num
and y.num=z.num