现有表t1,字段有aac001(主键),aac002,aac003.表t2,字段有id(主键),aac001,aic142
要建立一个数据窗,检索如下数据aac001,aac002,aac003,sum(aic142)(这个数据的含义是,t2里相同aac001的数据加和,也就是select aac001 sum(aic142) from t2 group by aac001)该咋建立这个数据窗
------解决方案--------------------
select t1.aac001,t1.aac002,t1.aac003,tt.sumaic142
from t1,
(select aac001 sum(aic142) as sumaic142
from t2 group by aac001) as tt
where t1.aac001 = tt.aac001