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这个思路的sql怎么写

发布时间: 2012-04-27 11:57:44 作者: rapoo

这个思路的sql如何写

SQL code
        select  ( select COUNT(*) from tmp  where tmp.f1=v1),            ( select COUNT(*) from tmp  where tmp.f2=v2),            ( select COUNT(*) from tmp  where tmp.f3=v3),            ...                       from    (select  * from table1 where f0 =...) as tmp   


???

[解决办法]
select case when tmp.f1=v1 then .....else 0 end as ...,
case when 实现

[解决办法]
select
sum(case when f0 = ... and f1 = 'v1' then 1 else 0 end) ,
sum(case when f0 = ... and f2 = 'v2' then 1 else 0 end) ,
sum(case when f0 = ... and f3 = 'v3' then 1 else 0 end) ,
...
from table1

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