使用 t-sql 计算时间跨度

Question

给定两个日期/时间：

@start_date = '2009-04-15 10:24:00.000'
@end_date = '2009-04-16 19:43:01.000'

是否可以按以下格式计算两个日期之间经过的时间

1d 9h 19m

Answer 1

CONVERT(varchar,(@end_date-@start_date),108)

这会将它作为 HH:MM:SS 提供给您

干杯

Answer 2

您可以get the difference between the two dates 达到您想要的任何分辨率（在您的示例中为分钟）：

DATEDIFF(minute, @start_date, @end_date)

从那里开始，只需将分钟划分为小时，将小时划分为天，然后修改其余部分。

Answer 3

我知道这个帖子比较老，最初的参与者可能不再看，但我偶然发现了它，并且最近已经编写了一些代码来做一些非常接近 jdiaz 要求的事情。结果以 D:H:M:S 格式呈现为字符串。

第一步是以秒为单位获取时间跨度：

DECLARE @ElapsedS INT
SET @ElapsedS = DATEDIFF(second, @start_date, @end_date)

现在创建以下标量函数：

CREATE FUNCTION [dbo].[udfTimeSpanFromSeconds]
(
    @Seconds int
)
RETURNS varchar(15)
AS
BEGIN
DECLARE 
    --Variable to hold our result
      @DHMS varchar(15)
    --Integers for doing the math
    , @Days int --Integer days
    , @Hours int --Integer hours
    , @Minutes int --Integer minutes
    --Strings for providing the display
    , @sDays varchar(5) --String days
    , @sHours varchar(2) --String hours
    , @sMinutes varchar(2) --String minutes
    , @sSeconds varchar(2) --String seconds

--Get the values using modulos where appropriate
SET @Hours = @Seconds/3600
SET @Minutes = (@Seconds % 3600) /60
SET @Seconds = (@Seconds % 3600) % 60

--If we have 24 or more hours, split the @Hours value into days and hours
IF @Hours > 23 
BEGIN
    SET @Days = @Hours/24
    SET @Hours = (@Hours % 24)
END
ELSE
BEGIN
    SET @Days = 0
END

--Now render the whole thing as string values for display
SET @sDays = convert(varchar, @Days)
SET @sHours = RIGHT('0' + convert(varchar, @Hours), 2)
SET @sMinutes = RIGHT('0' + convert(varchar, @Minutes), 2)
SET @sSeconds = RIGHT('0' + convert(varchar, @Seconds), 2)

--Concatenate, concatenate, concatenate
SET @DHMS =  @sDays + ':' + @sHours + ':' + @sMinutes + ':' + @sSeconds

RETURN @DHMS

END

现在将您的时间跨度输入到新创建的函数中：

SELECT TimeSpan = dbo.udfTimeSpanFromSeconds(@ElapsedS)

应该产生'1:09:19:01'

Answer 4

DATEDIFF 可能返回不直观的值。例如，下面的两个日期相差一秒，但 DATEDIFF 使用下面的参数并解释为其他人在上面解释它返回 1 年：

SELECT DATEDIFF(年, '2005-12-31 23:59:59', '2006-01-01 00:00:00')

查看 DATEDIFF 的 MSDN 文档以了解其工作原理。

Answer 5

datediff(datepart, date1, date2);

雷克斯的回答比较完整。

Answer 6

这是在查询中格式化 datediff (50d 8h 35m) 的方式：

Declare @Date1 as Datetime, @Date2 as Datetime
Set @Date1 = '2005-01-01 08:00:00'
Set @Date2 = '2005-02-20 16:35:30'

Select
CAST(DATEDIFF(Minute,@Date1, @Date2)/60/24 as Varchar(50)) ++ 'd ' ++ 
CAST((DATEDIFF(Minute,@Date1, @Date2)/60)-((DATEDIFF(Minute,@Date1, @Date2)/60/24)*24) as Varchar(50)) ++ 'h ' ++
CAST((DATEDIFF(Minute,@Date1, @Date2)) - (DATEDIFF(HOUR,@Date1, @Date2)*60) as Varchar(50)) ++ 'm' as FormattedDateDiff

Answer 7

DECLARE @FirstDate DATETIME, @SecondDate DATETIME, @result VARCHAR(MAX)
SELECT @FirstDate = '2017-03-01 09:54:00.637', @SecondDate = GETDATE()

DECLARE @Day INT,@Month INT,@Hour INT, @Minute INT,@TotalSeconds INT,@Year INT
SELECT @TotalSeconds = ABS(DATEDIFF(SECOND,@FirstDate,@SecondDate))

-- Standard values in seconds
DECLARE @YearSeconds INT, @MonthSeconds INT, @DaySeconds INT, @HourSeconds INT, @MinuteSeconds INT

SELECT  @MinuteSeconds = 60
SELECT  @HourSeconds = 60 * @MinuteSeconds 
SELECT  @DaySeconds = 24 * @HourSeconds
SELECT  @MonthSeconds = 30 * @DaySeconds
SELECT  @YearSeconds = 12 * @MonthSeconds

--SELECT @MinuteSeconds AS [Minutes], @HourSeconds AS [Hours], @DaySeconds AS [Day],@MonthSeconds AS [Month],@YearSeconds AS [Year]

IF @TotalSeconds < @MinuteSeconds
BEGIN
    SELECT @result = CAST(@TotalSeconds AS NVARCHAR(20)) + ' seconds ago' 
END
ELSE IF @TotalSeconds < @HourSeconds
BEGIN
    SELECT @result = CAST(ABS(DATEDIFF(MINUTE,@FirstDate,@SecondDate)) AS NVARCHAR(20)) + ' minutes ago' 
END
ELSE IF @TotalSeconds < @DaySeconds
BEGIN
    SELECT @result = CAST(ABS(DATEDIFF(HOUR,@FirstDate,@SecondDate)) AS     NVARCHAR(20)) + ' hours ago' 
END
ELSE IF @TotalSeconds < @MonthSeconds
BEGIN
    SELECT @result = CAST(ABS(DATEDIFF(DAY,@FirstDate,@SecondDate)) AS NVARCHAR(20)) + ' days ago' 
END
ELSE IF @TotalSeconds < @YearSeconds
BEGIN
    SELECT @result = CAST(ABS(DATEDIFF(MONTH,@FirstDate,@SecondDate)) AS NVARCHAR(20)) + ' months ago' 
END
ELSE IF @TotalSeconds > @YearSeconds
BEGIN
    SELECT @result = CAST(ABS(DATEDIFF(YEAR,@FirstDate,@SecondDate)) AS NVARCHAR(20)) + ' year ago' 
END


SELECT @result