按小时查询人工成本

Question

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编辑：请参阅Calculate how many minutes used in a given hour，了解我最终是如何解决此问题的。

我知道怎么做按小时销售的事情，因为我的计算基于实际销售的时间而不是随着时间的推移而推广。但是，考虑到下面的数据，我试图找出按小时计算劳动力的最佳方法。

EmployeeID  InTime   OutTime  PayRate  OTRate  DTRate
6           59:09.0  05:17.0  10.75    16.13   21.5
6           33:45.0  54:58.0  10.75    16.13   21.5
6           59:25.0  24:07.0  10.75    16.13   21.5
6           55:18.0  29:35.0  10.75    16.13   21.5
6           59:50.0  02:17.0  10.75    16.13   21.5
7           00:45.0  40:48.0  9.25     13.88   18.5
7           00:21.0  58:41.0  9.25     13.88   18.5
13          00:34.0  27:46.0  9        13.5    18
6           55:23.0  11:02.0  10.75    16.13   21.5
6           37:03.0  30:32.0  10.75    16.13   21.5

我知道我最终会弄明白这一点，但是如果有人能给我一些指示来加快这个过程，并让我做一些过分畏缩的话，我一定会很感激。我需要用这些信息做一些更复杂的报告，但首先我只是寻找最简单的查询，告诉我雇主每小时花在劳动上的费用。随意忽略加班/双倍时间，因为在我得到其他部分后，我可以将其纳入。

编辑：InTime和OutTime字段实际上是DateTimes ...由于某种原因，我在复制/粘贴时转换了值

编辑：结果看起来像......

Hour   Labor Cost

1:00       $
2:00       $
3:00       $
4:00       $
5:00       $
etc.

其中$是那小时劳动力的花费。所以我想做的第一件事是创建一个包含24行的表;每小时一个。然后输入/输出时间将加入新表中的小时字段。试着考虑一下现在看起来像什么样的连接表达式......

编辑：马克提醒我，我还需要显示日期和小时，这使我认为我的24行表实际上需要24 *但是我要查询多天。另外我意识到每小时1条记录不能很好地工作，因为人们工作时间很长，所以我认为我需要每分钟做一次记录，然后对这些结果进行分组/总结以获得准确的数据。

Answer 1

当然没有经过考验，但我相信这应该可以减去我所犯的错误：

-- Assume that there is a tblNumbers table
--  that has been populated with at least the values 0 to 60.
-- First, we need to find the days for which there are time records.
; WITH Days_cte (MyDay) AS
(
    SELECT DISTINCT
        -- Strip off the time from the date.  
        DATEADD(DAY, DATEDIFF(DAY, 0, InTime), 0) AS MyDay
    FROM tblTimeSheet

    UNION

    SELECT DISTINCT
        -- Strip off the time from the date.  
        DATEADD(DAY, DATEDIFF(DAY, 0, OutTime), 0) AS MyDay
    FROM tblTimeSheet
),
-- Next, explode this into hours AND minutes for every day.
-- This cte will contain 1440 records for every day.
Times_cte (MyTime) AS
(
    SELECT
        DATEADD(MINUTE, minutes.Number, 
                DATEADD(HOUR, hours.Number, days.MyDay)) AS MyTime
    FROM
        Days_cte days JOIN
        tblNumbers hours ON hours.Number < 24 JOIN
        tblNumbers minutes ON minutes.Number < 60 LEFT JOIN
)
-- Now, determine which of these minutes 
--  falls between an employee's in and out time.
SELECT
    -- Strip off the minutes, leaving only the hour.
    DATEADD(HOUR, DATEDIFF(HOUR, 0, times.MyTime), 0) AS [Hour],
    -- Divide by 60, since the aggregation is done by the minute.
    SUM(ISNULL(ts.PayRate, 0) / 60) AS LaborCost
FROM    
    Time_cte times LEFT JOIN
    tblTimeSheet ts ON times.MyTime BETWEEN ts.InTime AND ts.OutTime
GROUP BY
    DATEADD(HOUR, DATEDIFF(HOUR, 0, times.MyTime), 0)