Question

我有一个像这样的Cycles表：

Value   Name    Month

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

我想基于此表创建一个视图，其中对于每个名称，我将前几个月的值相加。这是预期的结果：

AccruedValue  Name    Month

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

我不确定如果不使用游标就可以实现这一点，所以任何帮助都将受到赞赏。

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

在多行条件下创建视图

1 个答案: