Sql server 按小时计算的总分钟数

我在数据表中有两个字段——“开始时间”和“结束时间”。这两个字段表示用户在特定任务上花费的持续时间。这些是varchar字段。因此，假设我们的开始时间为“21:05:00”，结束时间为“22:09:00”。我需要代码分别计算21小时和2200小时的总分钟数（即9分钟）。所以，不仅仅是一个简单的细微差别，而是一个小时的细分

最好的方法是什么

到目前为止，我已经创建了一个表，它将返回24小时内所有可能的小时数。以下是一个示例：

Hour    startTime                endTime
0       2015-01-01 00:00:00.000  2015-01-01 01:00:00.000
1       2015-01-01 01:00:00.000  2015-01-01 02:00:00.000
2       2015-01-01 02:00:00.000  2015-01-01 03:00:00.000

我将startTime字段从varchar转换为dateteime，并将其命名为sessionHour：

Convert(datetime, startTime) As sessionHour

此外，我还可以通过以下操作获得启动时间：

DateAdd(Minute, 60 * (DateDiff(Minute, 0, startTime) / 60), 0)  As hourOf

---

除此之外，我还不知道如何解析每小时的分钟数。

您可能需要查看

datepart（）

函数，它将帮助您更清晰地操作日期。例如：

select @endOfHour = dateadd(hour,
    1,
    datetimefromparts(
        datepart(year, @startTime),
        datepart(month, @startTime),
        datepart(day, @startTime),
        datepart(hour, @startTime),
        0,
        0,
        0));


select h.theHour, @startTime, @endOfHour, datediff(minute, @startTime, @endOfHour)
from ListOfHours as h
where datepart(hour, @startTime) = h.Hour;

---

你很接近。您只需要将数字表与数据结合起来。我会用它。下面是最终的解决方案

样本数据

DECLARE @Durations TABLE (ID int IDENTITY(1,1), StartTime datetime, EndTime datetime);

INSERT INTO @Durations VALUES
('2015-01-01 21:05:00', '2015-01-01 22:09:00'),
('2015-01-01 01:05:00', '2015-01-01 01:20:00'),
('2015-01-01 11:05:00', '2015-01-01 13:09:00'),
('2015-01-01 15:05:00', '2015-01-01 17:50:00'),
('2015-01-01 16:30:00', '2015-01-01 17:20:00');

我将从一开始就使用

datetime

类型，因为您已将

varchar

值转换为正确的

datetime

我将使用一个数字表。它的行数应与数据中最长持续时间（小时）的行数相同。可能超过24个。一般来说，在数据库中为其他报告设置这样的表是很有用的

DECLARE @Numbers TABLE (Number int);
INSERT INTO @Numbers VALUES (0),(1),(2),(3),(4),(5),(6),(7),(8),(9),(10);
-- Number of rows in this table should be more than the longest duration in hours

我需要一些时间参考点来删除

datetime

的分钟部分。它可以是任何日期时间，只要没有分和秒

DECLARE @VarStart datetime;
SET @VarStart = '2000-01-01';

主要步骤-展开数据 最终查询

最后，我以小时为单位对分钟分组求和：

SELECT
    HourStartFinal
    ,SUM(DATEDIFF(minute, MaxStart, MinEnd)) AS SumMinutesPerHour
FROM
    @Durations AS D
    CROSS APPLY
    (
        SELECT N.Number
        FROM @Numbers AS N
        WHERE N.Number <= DATEDIFF(hour, StartTime, EndTime)
    ) AS CA_Number
    CROSS APPLY
    (
        SELECT
            DATEADD(hour, CA_Number.Number, StartTime) AS HourStart
            ,DATEADD(hour, CA_Number.Number+1, StartTime) AS HourEnd
    ) AS CA_HourEnd
    CROSS APPLY
    (
        -- Truncate to 1 hour.
        SELECT
            DATEADD(hour, DATEDIFF(hour, @VarStart, HourStart), @VarStart) AS HourStartFinal
            ,DATEADD(hour, DATEDIFF(hour, @VarStart, HourEnd), @VarStart) AS HourEndFinal
    ) AS CA_HourEndFinal
    -- Intersect intervals [StartTime, EndTime] with [HourStartFinal, HourEndFinal]
    CROSS APPLY
    (
        SELECT
            CASE WHEN StartTime > HourStartFinal THEN StartTime ELSE HourStartFinal END AS MaxStart
            ,CASE WHEN EndTime < HourEndFinal THEN EndTime ELSE HourEndFinal END AS MinEnd
    ) AS CA_Intersect
GROUP BY HourStartFinal
ORDER BY HourStartFinal;

---

虽然弗拉基米尔·巴拉诺夫的答案是正确的，但它使用了许多交叉应用的方法

另一种按小时计算分钟数的方法是，在

starttime

和

endtime

的范围内，除第一个小时和最后一个小时外，所有其他小时的

minutediff

小时数为60

我们可以用它来构造我们的逻辑，类似这样的东西

DECLARE @UserTask TABLE (ID int IDENTITY(1,1),UserID INT,TaskID INT, StartTime datetime, EndTime datetime);

INSERT INTO @UserTask VALUES
(1,1,'2015-01-01 21:05:00', '2015-01-01 22:09:00'),
(1,1,'2015-01-01 01:05:00', '2015-01-01 01:20:00'),
(1,1,'2015-01-01 11:05:00', '2015-01-01 13:09:00'),
(1,1,'2015-01-01 15:05:00', '2015-01-01 17:50:00'),
(1,1,'2015-01-01 16:30:00', '2015-01-01 17:20:00'),
(2,2,'2015-01-01 21:05:00', '2015-01-01 22:09:00');

;WITH CTENum AS 
(
SELECT 1 rn UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1
), CTEHours as 
(
SELECT TOP 24 ROW_NUMBER()OVER(ORDER BY c1.rn) - 1 rn FROM CTENum c1 CROSS JOIN CTENum c2
)
SELECT ID,UserID,TaskID,StartTime,EndTime,rn as DayHour,
CASE WHEN r_asc = 1 AND r_desc = 1 THEN DATEDIFF(minute,StartTime,EndTime) 
WHEN r_asc = 1 THEN 60 - DATEPART(minute,StartTime)
WHEN r_desc = 1 THEN DATEPART(minute,EndTime)
ELSE 60 END MinuteTime
FROM @UserTask
CROSS APPLY(
SELECT *,ROW_NUMBER()OVER(ORDER BY rn ASC) r_asc,ROW_NUMBER()OVER(ORDER BY rn DESC) r_desc
FROM CTEHours C
WHERE C.rn BETWEEN DATEDIFF(hour,CONVERT(VARCHAR(10),StartTime,112),StartTime) AND DATEDIFF(hour,CONVERT(VARCHAR(10),StartTime,112),EndTime)
) N
ORDER BY ID,DayHour

---

你说得对，我用了很多交叉应用来说明它对复杂公式的用处。我假设OP希望看到这个答案：55分钟为21小时；当开始时间=“21:05:00”和结束时间=“22:09:00”时，第22小时9分钟。总持续时间为55+9=64分钟。您的查询返回的是21小时5分钟，而不是55分钟。您的

案例

公式中一定遗漏了一些比较。此外，当持续时间跨越午夜边界时，解决方案不起作用。请尝试将源数据中的

2015-01-01 22:09:00

更改为

2015-01-03 22:09:00

。@Vladimir-关于最初的小时持续时间的好消息。我错过了

60-x

。是的，我的解决方案在一天内有效：）。根据OP的问题和样本数据，他似乎没有跨越不同日期的记录。这非常有效，我对这把小提琴表示赞赏。非常感谢。我不清楚的一点是“数字”表以及它是如何连接所有这些的？

numbers

表只包含从0到足够大的连续数字。在我的数据库中，它有10万行。您只需填写一次，并在需要时在多个报告中使用。在本例中，我显式地向其中添加了几行，以使示例正常工作。在实际系统中，该表已经有了这些数字，并且在

Number

列上有主键/唯一索引。此表通过使用

交叉应用

连接到主表，它为每个原始行创建了几行。例如，如果某些行的持续时间跨越3小时，则该行将在交叉应用后出现3次。

ID   StartTime              EndTime                Number    HourStart              HourEnd                HourStartFinal         HourEndFinal           MaxStart               MinEnd                 MinutesPerHour
1    2015-01-01 21:05:00    2015-01-01 22:09:00    0         2015-01-01 21:05:00    2015-01-01 22:05:00    2015-01-01 21:00:00    2015-01-01 22:00:00    2015-01-01 21:05:00    2015-01-01 22:00:00    55
1    2015-01-01 21:05:00    2015-01-01 22:09:00    1         2015-01-01 22:05:00    2015-01-01 23:05:00    2015-01-01 22:00:00    2015-01-01 23:00:00    2015-01-01 22:00:00    2015-01-01 22:09:00    9
2    2015-01-01 01:05:00    2015-01-01 01:20:00    0         2015-01-01 01:05:00    2015-01-01 02:05:00    2015-01-01 01:00:00    2015-01-01 02:00:00    2015-01-01 01:05:00    2015-01-01 01:20:00    15
3    2015-01-01 11:05:00    2015-01-01 13:09:00    0         2015-01-01 11:05:00    2015-01-01 12:05:00    2015-01-01 11:00:00    2015-01-01 12:00:00    2015-01-01 11:05:00    2015-01-01 12:00:00    55
3    2015-01-01 11:05:00    2015-01-01 13:09:00    1         2015-01-01 12:05:00    2015-01-01 13:05:00    2015-01-01 12:00:00    2015-01-01 13:00:00    2015-01-01 12:00:00    2015-01-01 13:00:00    60
3    2015-01-01 11:05:00    2015-01-01 13:09:00    2         2015-01-01 13:05:00    2015-01-01 14:05:00    2015-01-01 13:00:00    2015-01-01 14:00:00    2015-01-01 13:00:00    2015-01-01 13:09:00    9
4    2015-01-01 15:05:00    2015-01-01 17:50:00    0         2015-01-01 15:05:00    2015-01-01 16:05:00    2015-01-01 15:00:00    2015-01-01 16:00:00    2015-01-01 15:05:00    2015-01-01 16:00:00    55
4    2015-01-01 15:05:00    2015-01-01 17:50:00    1         2015-01-01 16:05:00    2015-01-01 17:05:00    2015-01-01 16:00:00    2015-01-01 17:00:00    2015-01-01 16:00:00    2015-01-01 17:00:00    60
4    2015-01-01 15:05:00    2015-01-01 17:50:00    2         2015-01-01 17:05:00    2015-01-01 18:05:00    2015-01-01 17:00:00    2015-01-01 18:00:00    2015-01-01 17:00:00    2015-01-01 17:50:00    50
5    2015-01-01 16:30:00    2015-01-01 17:20:00    0         2015-01-01 16:30:00    2015-01-01 17:30:00    2015-01-01 16:00:00    2015-01-01 17:00:00    2015-01-01 16:30:00    2015-01-01 17:00:00    30
5    2015-01-01 16:30:00    2015-01-01 17:20:00    1         2015-01-01 17:30:00    2015-01-01 18:30:00    2015-01-01 17:00:00    2015-01-01 18:00:00    2015-01-01 17:00:00    2015-01-01 17:20:00    20

SELECT
    HourStartFinal
    ,SUM(DATEDIFF(minute, MaxStart, MinEnd)) AS SumMinutesPerHour
FROM
    @Durations AS D
    CROSS APPLY
    (
        SELECT N.Number
        FROM @Numbers AS N
        WHERE N.Number <= DATEDIFF(hour, StartTime, EndTime)
    ) AS CA_Number
    CROSS APPLY
    (
        SELECT
            DATEADD(hour, CA_Number.Number, StartTime) AS HourStart
            ,DATEADD(hour, CA_Number.Number+1, StartTime) AS HourEnd
    ) AS CA_HourEnd
    CROSS APPLY
    (
        -- Truncate to 1 hour.
        SELECT
            DATEADD(hour, DATEDIFF(hour, @VarStart, HourStart), @VarStart) AS HourStartFinal
            ,DATEADD(hour, DATEDIFF(hour, @VarStart, HourEnd), @VarStart) AS HourEndFinal
    ) AS CA_HourEndFinal
    -- Intersect intervals [StartTime, EndTime] with [HourStartFinal, HourEndFinal]
    CROSS APPLY
    (
        SELECT
            CASE WHEN StartTime > HourStartFinal THEN StartTime ELSE HourStartFinal END AS MaxStart
            ,CASE WHEN EndTime < HourEndFinal THEN EndTime ELSE HourEndFinal END AS MinEnd
    ) AS CA_Intersect
GROUP BY HourStartFinal
ORDER BY HourStartFinal;

HourStartFinal             SumMinutesPerHour
2015-01-01 01:00:00.000    15
2015-01-01 11:00:00.000    55
2015-01-01 12:00:00.000    60
2015-01-01 13:00:00.000    9
2015-01-01 15:00:00.000    55
2015-01-01 16:00:00.000    90
2015-01-01 17:00:00.000    70
2015-01-01 21:00:00.000    55
2015-01-01 22:00:00.000    9

DECLARE @UserTask TABLE (ID int IDENTITY(1,1),UserID INT,TaskID INT, StartTime datetime, EndTime datetime);

INSERT INTO @UserTask VALUES
(1,1,'2015-01-01 21:05:00', '2015-01-01 22:09:00'),
(1,1,'2015-01-01 01:05:00', '2015-01-01 01:20:00'),
(1,1,'2015-01-01 11:05:00', '2015-01-01 13:09:00'),
(1,1,'2015-01-01 15:05:00', '2015-01-01 17:50:00'),
(1,1,'2015-01-01 16:30:00', '2015-01-01 17:20:00'),
(2,2,'2015-01-01 21:05:00', '2015-01-01 22:09:00');

;WITH CTENum AS 
(
SELECT 1 rn UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1
), CTEHours as 
(
SELECT TOP 24 ROW_NUMBER()OVER(ORDER BY c1.rn) - 1 rn FROM CTENum c1 CROSS JOIN CTENum c2
)
SELECT ID,UserID,TaskID,StartTime,EndTime,rn as DayHour,
CASE WHEN r_asc = 1 AND r_desc = 1 THEN DATEDIFF(minute,StartTime,EndTime) 
WHEN r_asc = 1 THEN 60 - DATEPART(minute,StartTime)
WHEN r_desc = 1 THEN DATEPART(minute,EndTime)
ELSE 60 END MinuteTime
FROM @UserTask
CROSS APPLY(
SELECT *,ROW_NUMBER()OVER(ORDER BY rn ASC) r_asc,ROW_NUMBER()OVER(ORDER BY rn DESC) r_desc
FROM CTEHours C
WHERE C.rn BETWEEN DATEDIFF(hour,CONVERT(VARCHAR(10),StartTime,112),StartTime) AND DATEDIFF(hour,CONVERT(VARCHAR(10),StartTime,112),EndTime)
) N
ORDER BY ID,DayHour