日期:2014-05-18  浏览次数:20490 次

建这样一个视图,多个表相同结构,具体需求如下
表1   字段:   id,caller,callee,calltime,callfee
表2   字段,表3.........表7   结构都是同上....

需求1   建视图v_caller,联合这7个表,
能实现如下   sql   语句1   select   caller   from   v_caller   where   caller= '13900000000 '   group   by   caller   having   sum(callfee)   >   100
                                      2     select   caller   from   v_caller   where   caller= '13900000000 '   group   by   caller   having   count(caller)> 2  

这样的   view   怎么建?

------解决方案--------------------
create view v_caller
as
select * from T1
union all
select * from T2
union all
...

------解决方案--------------------
create view v_caller
as
select caller from
(
select * from T1
union all
select * from T2
union all
......
select * from T7
) t
where caller= '13900000000 ' group by caller having sum(callfee) > 100

------解决方案--------------------
create view v_caller
as
select caller
from
(
select * from T1
union all
select * from T2
union all
select * from T3
union all
select * from T4
union all
select * from T5
union all
select * from T6
union all
select * from T7
) t
where caller= '13900000000 '
group by caller
having sum(callfee) > 100