Question

我需要计算每周5年的现金流量。
源表：

ID    WeekNumber    DayTime     Dollars
1     1             2012-01-01  10
2     1             2012-01-02  10
3     2             2012-01-08  20
....
353   1             2013-01-01  30

表格包含每天5年的天数。 WeekNumber从每年的数字1开始。

总之，视图应该如下：

WeekNumber    CashFlow
1             (sum)
2             (sum)
3             (sum)
....
1             (sum)
2             (sum)
3             (sum)

我试过了：

SELECT *, 
CashFlow = (SELECT SUM(X.TotalSum) as TT 
            FROM (SELECT WeekNumber, SUM(Dollars) as TotalSum 
                  FROM dbo.Temp  
                  GROUP BY WeekNumber) X 
            WHERE X.WeekNumber <= Y.WeekNumber) 
FROM(SELECT WeekNumber,  SUM(Dollars) as TotalSum 
     FROM dbo.Temp  
     GROUP BY WeekNumber) Y 
ORDER BY WeekNumber ASC

一年它会返回正确的数字，但是5年后它只返回53行，包含每年每周的现金流量总和。

您有什么想法如何改善它以获得所需的结果？

Answer 1

您需要使用Year列来分割每年的总计，您可以使用Year函数中包含的DateTime列来动态执行此操作

SELECT 
  WeekNumber, Year = YEAR(DayTime), CashFlow = SUM(Dollars) 
From InsertFromExel.dbo.Temp
Group By
   WeekNumber, YEAR(DayTime)

Answer 2

这适用于您描述的表以及您想要的输出：（编辑：如果您希望您的确切输出从SELECT中删除年份部分）

SELECT YEAR(DayTime) as Year, WeekNumber, SUM(Dollars) as CashFlow
FROM InsertFromExel.dbo.Temp
GROUP BY WeekNumber, YEAR(DayTime)
ORDER BY Year asc, WeekNumber asc

按年份分组（DayTime）和WeekNumber将合并这两个属性匹配的所有行并生成单个结果行。通过SUM（美元），为每个匹配添加所有美元，并将总和作为相应结果行的输出。 ORDER BY按年排序，然后按周排序（asc =升序）。

编辑：添加ORDER BY部分。

Answer 3

这是有用的

    create table #tmp (ID Int, weeknumber int, DayTime DATETIME,Dollars int)

    insert into #tmp values(1,1,'2012-01-01',10)
    insert into #tmp values(1,1,'2012-01-02',10)

    insert into #tmp values(1,2,'2012-01-08',20)
    insert into #tmp values(1,2,'2012-01-09',30)

    insert into #tmp values(1,3,'2012-01-15',90)
    insert into #tmp values(1,3,'2012-01-16',30)

    insert into #tmp values(1,1,'2013-01-01',30)
    insert into #tmp values(1,1,'2013-01-02',10)

    insert into #tmp values(1,2,'2013-01-08',40)
    insert into #tmp values(1,2,'2013-01-09',20)

    insert into #tmp values(1,3,'2013-01-15',60)
    insert into #tmp values(1,3,'2013-01-16',70)


    select weeknumber,Sum(Dollars) As Cashflow from #tmp
    Group by Year(DayTime),weeknumber
    order by Year(DayTime),weeknumber

    drop table #tmp

如何计算每周5年的现金流量？

3 个答案: