Close_time和Open_time之間的時間間隔

Question

我在SQL中有一個問題。 我使用MS SQL SERVER 2012 我需要計算Close_time和Open_time之間的差異。 我如何設定年 - 月 - 日 - 時 - 分 - 秒的範圍。 **例如：

Start_time : 2017:01.01 20:30:15 
Close_time : 2018.02.05 22:58:35 
Output: 0001:01:04 02:28:20** 

我知道，這是不正確的，因爲它不是一個時間間隔。

Select Name, 
Convert(VARCHAR,CAST(AVG(CAST(CAST(CLOSE_TIME as datetime) - CAST(OPEN_TIME as datetime)as float)) as datetime), 120)as TM 
From [dbo].[INCIDENTS] 

Answer 1

您的代碼建議SQL Server。你可以只減去值：

SELECT CAST(CLOSE_TIME as datetime) - CAST(OPEN_TIME as datetime) 

注意：您真的應該存儲等領域的日期/時間值。如果是，只需減去它們：

SELECT (CLOSE_TIME - OPEN_TIME) 

Answer 2

如果您對UDF開放。這個表值函數是精確和高性能的。

我添加了一個名爲ELAPSED的字段，這是您想要的格式，但我還剩下了幾年，幾個月，幾天，幾小時，幾分鐘和幾秒鐘。如果需要的話

例

Declare @YourTable table (ID int,DateBeg datetime,DateEnd datetime) 
Insert Into @YourTable values 
(1,'2017-01-01 20:30:15','2018-02-05 22:58:35') 

Select A.* 
     ,B.Elapsed 
From @YourTable A 
Cross Apply [dbo].[udf-Date-Elapsed](A.DateBeg,A.DateEnd) B 

返回

ID DateBeg     DateEnd      Elapsed 
1 2017-01-01 20:30:15.000 2018-02-05 22:58:35.000  0001:01:04 02:28:20 

的UDF如果有意

CREATE FUNCTION [dbo].[udf-Date-Elapsed] (@D1 DateTime,@D2 DateTime) 
Returns Table 
Return (
    with cteBN(N) as (Select 1 From (Values(1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) N(N)), 
     cteRN(R) as (Select Row_Number() Over (Order By (Select NULL))-1 From cteBN a,cteBN b,cteBN c), 
     cteYY(N,D) as (Select Max(R),Max(DateAdd(YY,R,@D1))From cteRN R Where DateAdd(YY,R,@D1)<=@D2), 
     cteMM(N,D) as (Select Max(R),Max(DateAdd(MM,R,D)) From (Select Top 12 R From cteRN Order By 1) R, cteYY P Where DateAdd(MM,R,D)<=@D2), 
     cteDD(N,D) as (Select Max(R),Max(DateAdd(DD,R,D)) From (Select Top 31 R From cteRN Order By 1) R, cteMM P Where DateAdd(DD,R,D)<=@D2), 
     cteHH(N,D) as (Select Max(R),Max(DateAdd(HH,R,D)) From (Select Top 24 R From cteRN Order By 1) R, cteDD P Where DateAdd(HH,R,D)<=@D2), 
     cteMI(N,D) as (Select Max(R),Max(DateAdd(MI,R,D)) From (Select Top 60 R From cteRN Order By 1) R, cteHH P Where DateAdd(MI,R,D)<=@D2), 
     cteSS(N,D) as (Select Max(R),Max(DateAdd(SS,R,D)) From (Select Top 60 R From cteRN Order By 1) R, cteMI P Where DateAdd(SS,R,D)<=@D2) 

    Select [Years] = cteYY.N 
      ,[Months] = cteMM.N 
      ,[Days] = cteDD.N 
      ,[Hours] = cteHH.N 
      ,[Minutes] = cteMI.N 
      ,[Seconds] = cteSS.N 
      ,[Elapsed] = Format(cteYY.N,'0000')+':'+Format(cteMM.N,'00')+':'+Format(cteDD.N,'00')+' '+Format(cteHH.N,'00')+':'+Format(cteMI.N,'00')+':'+Format(cteSS.N,'00') 
    From cteYY,cteMM,cteDD,cteHH,cteMI,cteSS 
) 
--Max 1000 years 
--Select * from [dbo].[udf-Date-Elapsed] ('1991-09-12 21:00:00.000',GetDate()) 
--Select * from [dbo].[udf-Date-Elapsed] ('2017-01-01 20:30:15','2018-02-05 22:58:35') 

這些可被移除

EDIT - 對於標量值函數

例

Select [dbo].[udf-Str-Elapsed] ('2017-01-01 20:30:15','2018-02-05 22:58:35') 

返回

0001:01:04 02:28:20 

標量函數

CREATE FUNCTION [dbo].[udf-Str-Elapsed] (@D1 DateTime,@D2 DateTime) 
Returns varchar(100) 
AS 
Begin 
    Declare @RetVal varchar(100) 
    ;with cteBN(N) as (Select 1 From (Values(1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) N(N)), 
      cteRN(R) as (Select Row_Number() Over (Order By (Select NULL))-1 From cteBN a,cteBN b,cteBN c), 
      cteYY(N,D) as (Select Max(R),Max(DateAdd(YY,R,@D1))From cteRN R Where DateAdd(YY,R,@D1)<=@D2), 
      cteMM(N,D) as (Select Max(R),Max(DateAdd(MM,R,D)) From (Select Top 12 R From cteRN Order By 1) R, cteYY P Where DateAdd(MM,R,D)<=@D2), 
      cteDD(N,D) as (Select Max(R),Max(DateAdd(DD,R,D)) From (Select Top 31 R From cteRN Order By 1) R, cteMM P Where DateAdd(DD,R,D)<=@D2), 
      cteHH(N,D) as (Select Max(R),Max(DateAdd(HH,R,D)) From (Select Top 24 R From cteRN Order By 1) R, cteDD P Where DateAdd(HH,R,D)<=@D2), 
      cteMI(N,D) as (Select Max(R),Max(DateAdd(MI,R,D)) From (Select Top 60 R From cteRN Order By 1) R, cteHH P Where DateAdd(MI,R,D)<=@D2), 
      cteSS(N,D) as (Select Max(R),Max(DateAdd(SS,R,D)) From (Select Top 60 R From cteRN Order By 1) R, cteMI P Where DateAdd(SS,R,D)<=@D2) 

    Select @RetVal = Format(cteYY.N,'0000')+':'+Format(cteMM.N,'00')+':'+Format(cteDD.N,'00')+' '+Format(cteHH.N,'00')+':'+Format(cteMI.N,'00')+':'+Format(cteSS.N,'00') 
    From cteYY,cteMM,cteDD,cteHH,cteMI,cteSS 

    Return @RetVal 

End