Question

我需要返回一个结果集，其中包含我的合同，项目表中最后一个日期的最后一个值;稍后我将需要使用此结果集来预测我预测的剩余月份的值。我似乎没有到达任何地方，我需要采取每个项目的最后日期，价值对＆amp;合同并预测它。我只走了第一部分，即提取最后的日期，价值;还需要第二部分的帮助，即采取这种结果并进行预测。我们走了：

我的桌子

contrato,projeto,data,valor
C001    P1  01-APR-15   10
C001    P1  01-APR-15   10
C001    P1  01-MAY-15   15
C001    P2  01-MAY-15   19
C001    P2  01-JUN-15   21
C002    P1  01-JUL-15   19
C002    P2  01-AUG-15   19

我的查询

select CONTRATO,PROJETO,FCST,
LAST_VALUE("PERIODO" IGNORE NULLS)OVER (PARTITION BY contrato,projeto,FCST,periodo   ORDER BY contrato,projeto,FCST RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING)LAST_DATE
from(
select CONTRATO,PROJETO,periodo,
  LAST_VALUE("VALOR" IGNORE NULLS)OVER (PARTITION BY contrato,projeto,periodo,valor ORDER BY PERIODO,contrato,projeto RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING )FCST
  FROM "HYP_STAGE"."INVENT_TABLE_FCST"
  )ORDER BY CONTRATO,PROJETO,PERIODO;

我的结果集，正在重复月份的值，每月只需要一个值;

C001    P1  10  01-APR-15
C001    P1  10  01-APR-15
C001    P1  15  01-MAY-15
C001    P2  19  01-MAY-15
C001    P2  21  01-JUN-15
C002    P1  19  01-JUL-15
C002    P2  19  01-AUG-15

非常感谢！

Answer 1

这是您可能需要的查询：

SQLFiddle demo

select distinct contrato, projeto, 
    last_value(periodo) over (partition by contrato, projeto 
      order by periodo nulls first 
      rows between unbounded preceding and unbounded following) p,
    last_value(valor) over (partition by contrato, projeto 
      order by periodo nulls first 
      rows between unbounded preceding and unbounded following) v
  from INVENT_TABLE_FCST order by contrato, projeto

关于预测未来期间结果的问题的第二部分，您没有通过预测结果解释您的意思。

如果我有更多变量，如细分，产品如何查询？

我怀疑细分和产品的处理方式应与contrato和projecto相同，因此您需要将这些列添加到select ...部分和partition by...部分。

但您可能希望以类似valor的方式对待它们，这取决于您的需求。

第二部分，需要提前48个月预测上个月的值（填写相同的值）

为此，我们需要一些生成新句点的分层查询，在这里我使用了recursive CTE：

with data(n, contrato, projeto, periodo, valor) as (
  select distinct 1, contrato, projeto,
      last_value(periodo) over (partition by contrato, projeto
        order by periodo nulls first 
        rows between unbounded preceding and unbounded following) periodo,
      last_value(valor) over (partition by contrato, projeto
        order by periodo nulls first 
        rows between unbounded preceding and unbounded following) valor
    from INVENT_TABLE_FCST  
  union all
  select n+1, contrato, projeto, add_months(periodo, 1), valor
    from data where n<48 )
select contrato, projeto, periodo, valor 
  from data order by contrato, projeto, periodo

完美！它运作得很好！

那么为什么不将答案标记为已接受？ ; - ）

还有一点需要注意：如果你的表中有任何主键，那将是非常好的，所以我们有不同的增量使分区和排序正确的值。

oracle last_value函数和预测

1 个答案: