创建多行条件

Question

视图我有一个周期表是这样的：

Value Name Month 

10 P00006 201412 
20 P00006 201501 
30 P00006 201502 
100 P00007 201509 
200 P00007 201510 
300 P00007 201511 

我想创建基于此表，其中每个名称我总结了前几个月的值的视图。 这种预期的结果：

AccruedValue Name Month 

10 P00006 201412 
30 P00006 201501 
60 P00006 201502 
100 P00007 201509 
300 P00007 201510 
600 P00007 201511 

我不知道这个可以不用使用光标所以任何帮助将不胜感激来实现。

Answer 1

测试数据：

create table cycles 
(value NUMBER, name VARCHAR2(250), month VARCHAR2(250)); 
/
INSERT INTO cycles VALUES(10 , 'P00006','201412'); 
INSERT INTO cycles VALUES(20 , 'P00006','201501'); 
INSERT INTO cycles VALUES(30 , 'P00006','201502'); 
INSERT INTO cycles VALUES(100 , 'P00007','201509'); 
INSERT INTO cycles VALUES(200 , 'P00007','201510'); 
INSERT INTO cycles VALUES(300 , 'P00007','201511'); 

查看my_view：

create or replace view my_view as 
select 
    sum(value) over (partition by name order by month) as AccruedValue , 
    name , 
    month 
from cycles; 

结果：

select * from v; 

10 P00006 201412 
30 P00006 201501 
60 P00006 201502 
100 P00007 201509 
300 P00007 201510 
600 P00007 201511