小时之间的日期差异

Datediff between hours

我的数据是这样的:

Col1     Col2     output
09:35    16:00    6,25 <-- need help with this

我希望输出显示 H,m(小时,分钟)

Datediff(Hours,Col1,Col2)  

给我7。

我不想做任何参数如果可能只使用一些简单的功能

您可以尝试以下解决方案之一:

-- Solution 1: Mathematical correct time
CREATE TABLE #time(col1 time, col2 time)

INSERT INTO #time(col1, col2)
VALUES(N'09:35',N'16:00'),(N'8:10',N'22:44')

SELECT col1, col2, CONVERT(decimal(10,2),DATEDIFF(MINUTE,Col1,Col2))/60  as [output]
FROM #time

DROP TABLE #time
GO

-- Solution 2: Your expected value
CREATE TABLE #time(col1 time, col2 time)

INSERT INTO #time(col1, col2)
VALUES(N'09:35',N'16:00'),(N'8:10',N'22:44')

SELECT DATEDIFF(MINUTE,Col1,Col2)/60 as [hours], DATEDIFF(MINUTE,Col1,Col2)%60 as [minutes],
    -- Contated values:
    DATEDIFF(MINUTE,Col1,Col2)/60 + (CONVERT(decimal(10,2),DATEDIFF(MINUTE,Col1,Col2)%60))/100 as [output]
FROM #time

DROP TABLE #time

Solution 1 的输出:

col1             col2             output
---------------- ---------------- ---------------------------------------
09:35:00.0000000 16:00:00.0000000 6.416666
08:10:00.0000000 22:44:00.0000000 14.566666

Solution 2 的输出:

hours       minutes     output
----------- ----------- ---------------------------------------
6           25          6.250000
14          34          14.340000

如果需要,您仍然可以 round/convert 匹配您的 2 位数字模式的值。

我想我会通过以分钟为单位的差异并进行数字计算来明确地做到这一点:

select (cast(datediff(minute, col1, col2) / 60 as varchar(255)) + ',' +
        right('00' + cast(datediff(minute, col1, col2) % 60 as varchar(255)), 2)
       )

如何获取以分钟为单位的日期差异并将结果转换为您想要的字符串:

SELECT CONCAT(DATEDIFF(MINUTE, '09:35', '16:00') / 60, ':', DATEDIFF(MINUTE, '09:35', '16:00') % 60 );

请注意,如果第二个 col1 时间大于 col2 时间,您会得到一个奇怪的结果。

通过简单地将两个时间转换为日期时间,您可以减去它们:

SELECT 
  cast(cast('16:00' as datetime) - cast('09:35' as datetime) as time(0))

结果:

06:25:00

如果你有类似的格式(我更喜欢时间格式):

SELECT 
  stuff(left(cast(cast('16:00' as datetime) 
    - cast('09:35' as datetime) as time(0)), 5), 3,1,',')

结果:

06,25