Question

根据日期范围，我计算每个月的百分比。我遇到的问题是我编写它的方式它给了我输入的整个日期范围的百分比。所以例如每个月将是54％而不是每个月的唯一百分比。我确信有一个简单的解决方案，我只是不知道它是什么。我认为我使它变得比它需要的更复杂。

SELECT DATEADD(MONTH, DATEDIFF(MONTH, 0, finspectdata), 0) AS 'Date' 
,COUNT(*) AS Lots
,sum(flotSize) as 'Lot Size'
,sum(fnumreject) as Rejected
,sum(fsampSize) as 'Sample Size'
,((select cast(count(*) as decimal) 
from monthlyinspect 
where finspectData < fddue_date 
and fddue_date >= '20140101' 
and fddue_date <= '20140531') / (select cast(count(*) as decimal) 
from monthlyinspect 
where fddue_date > '20140101' 
and fddue_date < '20140531')) 
FROM monthlyinspect 
WHERE finspectdata >= '20140101' 
AND finspectdata <= '20140531' 
GROUP BY DATEADD(MONTH, DATEDIFF(MONTH, 0, finspectdata), 0)
Order by 'Date'

输出

Date                       Lots  Lot Size  Rejected Sample Size   Percent
--------------------------------------------------------------------------------------
2014-01-01 00:00:00.000      916    455358  3082    10835   0.5488603615404768142
2014-02-01 00:00:00.000      692    410567  1114    7870    0.5488603615404768142
2014-03-01 00:00:00.000      694    424251  391     8095    0.5488603615404768142
2014-04-01 00:00:00.000      872    429746  1642    10017   0.5488603615404768142
2014-05-01 00:00:00.000      633    312913  572     7340    0.5488603615404768142

Answer 1

如果我理解了查询，那么我认为这就是你要做的。

SELECT 
      DATEADD(MONTH, DATEDIFF(MONTH, 0, finspectdata), 0) AS 'Date' 
    , COUNT(*) AS Lots
    , SUM(flotSize) as 'Lot Size'
    , SUM(fnumreject) as Rejected
    , SUM(fsampSize) as 'Sample Size'
    , SUM(CASE 
            WHEN finspectdata < fddue_date  
                AND 
                    fddue_date >= '20140101'
                AND 
                    fddue_date <= '20140531'
            THEN 
                1
            ELSE 
                0
          END)
          /
        SUM(CASE 
            WHEN 
                fddue_date >= '20140101'
                AND 
                    fddue_date <= '20140531'
            THEN 
                1
            ELSE 
                0
          END)      

FROM 
    monthlyinspect 
WHERE 
    finspectdata >= '20140101' 
    AND 
        finspectdata <= '20140531' 
GROUP BY 
    DATEADD(MONTH, DATEDIFF(MONTH, 0, finspectdata), 0)
ORDER BY 
    'Date'

希望这会让你朝着正确的方向前进。

或者，我可能会考虑在许多步骤中构建此查询。

在一个数据集中获取组数据，然后在另一个数据集中获取百分比。然后根据日期将两者结合起来。

有了类似的东西，我通常会使用临时表（变量）来处理数据，而我正在处理它。

使用强制转换SQL Server 2005划分两个计数

1 个答案: