Question

我在SQL中有一个问题。我使用MS SQL SERVER 2012 我需要计算Close_time和Open_time之间的差异。如何制作年 - 月 - 小时 - 分 - 秒的范围。 **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**

我知道这不正确，因为它不是时间间隔。

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

您的代码建议使用SQL Server。你可以减去这些值：

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

注意：您应该将这些字段存储为日期/时间值。如果你是，只需减去它们：

SELECT (CLOSE_TIME - OPEN_TIME)

Answer 2

如果您对UDF持开放态度。这个表值函数是精确且高效的。

我添加了一个名为ELAPSED的字段，这是您想要的格式，但我还留下了年，月，日，小时，分钟和秒。如果需要，可以删除它们

示例

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

<强>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

感兴趣的UDF

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')

编辑 - 对于标量值函数

示例

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

<强>返回

0001:01:04 02:28:20

标量函数

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

Close_time和Open_time之间的时间间隔

2 个答案: