Sql 缺少日期的运行总和

我有这样一个数据表：

PeriodYearMonth Reg      PartNo             ComponentRemovals   RunningRemovals
2019 10         G-NHVP   109-0740V01-137    1                    1
2019 11         G-NHVP   109-0740V01-137    1                    2  
2019 12         G-NHVP   109-0740V01-137    1                    3
2020 01         G-NHVP   109-0740V01-137    1                    4
2019 10         OO-NSF   11-13354P          1                    1
2019 09         G-NHVR   11-13354P          2                    2 
2019 10         OY-HMV   11-13354P          1                    1

在最后一列中，我计算了每个零件号和每个注册的7个月连续清除量之和。为此，我编写了以下代码：

/****** Find Running Component Removals ******/
SELECT  [PeriodYearMonth]
      ,[Reg]
      ,[PartNo]
      ,[ComponentRemovals]
      ,sum(sum(ComponentRemovals)) over (Partition by [Reg], PartNo Order By PeriodYearMonth, PeriodYearMonth rows between 6 preceding and current row) as RunningRemovals
      ,[ConfirmedFailures]
      , sum(sum(ConfirmedFailures)) over (Partition by [Reg], PartNo Order By PeriodYearMonth, PeriodYearMonth rows between 6 preceding and current row) as RunningFailures

  FROM [RALNHVTST].[dbo].[vtRelRepComponentsRemovalsByPartNo]

  Group by Reg, PartNo, ComponentRemovals, ConfirmedFailures, PeriodYearMonth
  Order by PartNo

但是，由于并非所有月份都包含在PeriodYearMonth列中，因此结果不正确。我在网上看到过简单案例的解决方案，但对我来说，棘手的是，我需要为每个PartNo、每个Reg和每个月输入一个条目

任何帮助都将不胜感激

问候

在最后一列中，我计算了过去7个月内每个PartNo和每个Reg的清除量的运行总和

删除windowing子句和筛选器：

select [PeriodYearMonth], [Reg], [PartNo], [ComponentRemovals],
        sum(sum(ComponentRemovals)) over (Partition by [Reg], PartNo Order By PeriodYearMonth, PeriodYearMonth) as RunningRemovals
        [ConfirmedFailures],
        sum(sum(ConfirmedFailures)) over (Partition by [Reg], PartNo Order By PeriodYearMonth, PeriodYearMont) as RunningFailures
from [RALNHVTST].[dbo].[vtRelRepComponentsRemovalsByPartNo]
where PeriodYearMonth >= format(dateadd(month, -7, getdate()), 'yyyy MM')
group by Reg, PartNo, ComponentRemovals, ConfirmedFailures, PeriodYearMonth
Order by PartNo

---

要解决此问题，您需要为所有

PeriodYearMonth

值（使用递归CTE生成）以及不同的

Reg

和

PartNo

对创建单独的派生表，并将它们相互交叉连接以获得列的所有组合。然后，可以将此组合表

左连接到原始表，以获得每个
Reg
、
PartNo
和
PeriodYearMonth
的
组件删除量
，然后可以使用窗口函数将其相加：

WITH CTE AS (
  SELECT CONVERT(DATE, CONCAT(REPLACE(MIN(PeriodYearMonth), ' ', '-'), '-01'), 23)  AS date, 
         CONVERT(DATE, CONCAT(REPLACE(MAX(PeriodYearMonth), ' ', '-'), '-01'), 23)  AS max_date
  FROM vtRelRepComponentsRemovalsByPartNo
  UNION ALL
  SELECT DATEADD(MONTH, 1, date), max_date
  FROM CTE
  WHERE date < max_date
)
SELECT FORMAT(CTE.date, 'yyyy MM') AS PeriodYearMonth
     , rp.Reg
     , rp.PartNo
     , COALESCE(v.ComponentRemovals, 0) AS ComponentRemovals
     , SUM(COALESCE(v.ComponentRemovals, 0)) OVER (PARTITION BY rp.Reg, rp.PartNo ORDER BY FORMAT(CTE.date, 'yyyy MM')
                                                   ROWS BETWEEN 6 PRECEDING AND CURRENT ROW) AS RunningRemovals
FROM CTE
CROSS JOIN (SELECT DISTINCT Reg, PartNo FROM vtRelRepComponentsRemovalsByPartNo) rp
LEFT JOIN vtRelRepComponentsRemovalsByPartNo v
       ON v.PeriodYearMonth = FORMAT(CTE.date, 'yyyy MM')
      AND v.Reg = rp.Reg
      AND v.PartNo = rp.PartNo
ORDER BY rp.Reg, rp.PartNo, CTE.date


请注意，如果所有感兴趣的
PeriodYearMonth
值都出现在
vtrerepcomponentsremovalsbypartno
中，则只需使用
SELECT DISTINCT…
子查询即可获得这些值，而不是递归的
CTE
子查询即可

SELECT d.PeriodYearMonth
     , rp.Reg
     , rp.PartNo
     , COALESCE(v.ComponentRemovals, 0) AS ComponentRemovals
     , SUM(COALESCE(v.ComponentRemovals, 0)) OVER (PARTITION BY rp.Reg, rp.PartNo ORDER BY d.PeriodYearMonth
                                                   ROWS BETWEEN 6 PRECEDING AND CURRENT ROW) AS RunningRemovals
FROM (SELECT DISTINCT PeriodYearMonth FROM vtRelRepComponentsRemovalsByPartNo) d
CROSS JOIN (SELECT DISTINCT Reg, PartNo FROM vtRelRepComponentsRemovalsByPartNo) rp
LEFT JOIN vtRelRepComponentsRemovalsByPartNo v
       ON v.PeriodYearMonth = d.PeriodYearMonth
      AND v.Reg = rp.Reg
      AND v.PartNo = rp.PartNo
ORDER BY rp.Reg, rp.PartNo, d.PeriodYearMonth

您使用的是哪种dbms？构建并填充一个包含所有年度月份的表格。请将其加入您的查询。谢谢您的回复，但这并不能解决我的问题。我应该说是7个月的连续金额，而不是“过去7个月”。@CathalClavie。这是相当含糊的。原来的措辞听起来很像过去的七个月。非常感谢！我得到一个错误：“无法解决concat操作中“Latin1_General_CS_AS”和“Latin1_General_CI_AS”之间的排序规则冲突。”我以前遇到过这种情况，但我不知道如何解决它。在concat操作中，我只看到一个colum（PeriodYearMonth）。你知道我还需要改变什么变量来解决这个问题吗？你可以忽略它。我通过整理外话解决了这个问题。@CathalClavie很抱歉，我没有时间回答你的评论，但我很高兴你自己找到了答案，这给了你想要的结果。
SELECT d.PeriodYearMonth
     , rp.Reg
     , rp.PartNo
     , COALESCE(v.ComponentRemovals, 0) AS ComponentRemovals
     , SUM(COALESCE(v.ComponentRemovals, 0)) OVER (PARTITION BY rp.Reg, rp.PartNo ORDER BY d.PeriodYearMonth
                                                   ROWS BETWEEN 6 PRECEDING AND CURRENT ROW) AS RunningRemovals
FROM (SELECT DISTINCT PeriodYearMonth FROM vtRelRepComponentsRemovalsByPartNo) d
CROSS JOIN (SELECT DISTINCT Reg, PartNo FROM vtRelRepComponentsRemovalsByPartNo) rp
LEFT JOIN vtRelRepComponentsRemovalsByPartNo v
       ON v.PeriodYearMonth = d.PeriodYearMonth
      AND v.Reg = rp.Reg
      AND v.PartNo = rp.PartNo
ORDER BY rp.Reg, rp.PartNo, d.PeriodYearMonth