創建多行條件

Question

視圖我有一個週期表是這樣的：

Value Name Month 

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

我想創建基於此表，其中每個名稱我總結了前幾個月的值的視圖。 這種預期的結果：

AccruedValue Name Month 

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

我不知道這個可以不用使用光標所以任何幫助將不勝感激來實現。

Answer 1

測試數據：

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; 

結果：

select * from v; 

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