Question

我有一个看起来像下面的表，我试图通过持续时间列将其拆分，所以我得到，在下面的例子中，60行，但每分钟时间间隔，意味着时间将增加一分钟。

Filmtitle                   startTime                   duration
----------------------------------------------------------------
WW2's most daring raids     2016-10-03 00:00:00.000        60

期望的结果：

WW2's most daring raids     2016-10-03 00:00:01.000        60
WW2's most daring raids     2016-10-03 00:00:02.000        60
...
WW2's most daring raids     2016-10-03 00:00:59.000        60

有什么想法吗？

提前致谢。

Answer 1

我有一个可能有帮助的TVF。它用于创建动态日期范围。 Tally / Numbers表也可以解决这个问题。

Filmtitle               SomeName                duration
WW2's most daring raids 2016-10-03 00:00:00.000 60
WW2's most daring raids 2016-10-03 00:01:00.000 60
WW2's most daring raids 2016-10-03 00:02:00.000 60
---
WW2's most daring raids 2016-10-03 00:57:00.000 60
WW2's most daring raids 2016-10-03 00:58:00.000 60
WW2's most daring raids 2016-10-03 00:59:00.000 60

返回

CREATE FUNCTION [dbo].[udf-Range-Date] (@R1 datetime,@R2 datetime,@Part varchar(10),@Incr int)
Returns Table
Return (
    with cte0(M)   As (Select 1+Case @Part When 'YY' then DateDiff(YY,@R1,@R2)/@Incr When 'QQ' then DateDiff(QQ,@R1,@R2)/@Incr When 'MM' then DateDiff(MM,@R1,@R2)/@Incr When 'WK' then DateDiff(WK,@R1,@R2)/@Incr When 'DD' then DateDiff(DD,@R1,@R2)/@Incr When 'HH' then DateDiff(HH,@R1,@R2)/@Incr When 'MI' then DateDiff(MI,@R1,@R2)/@Incr When 'SS' then DateDiff(SS,@R1,@R2)/@Incr End),
         cte1(N)   As (Select 1 From (Values(1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) N(N)),
         cte2(N)   As (Select Top (Select M from cte0) Row_Number() over (Order By (Select NULL)) From cte1 a, cte1 b, cte1 c, cte1 d, cte1 e, cte1 f, cte1 g, cte1 h ),
         cte3(N,D) As (Select 0,@R1 Union All Select N,Case @Part When 'YY' then DateAdd(YY, N*@Incr, @R1) When 'QQ' then DateAdd(QQ, N*@Incr, @R1) When 'MM' then DateAdd(MM, N*@Incr, @R1) When 'WK' then DateAdd(WK, N*@Incr, @R1) When 'DD' then DateAdd(DD, N*@Incr, @R1) When 'HH' then DateAdd(HH, N*@Incr, @R1) When 'MI' then DateAdd(MI, N*@Incr, @R1) When 'SS' then DateAdd(SS, N*@Incr, @R1) End From cte2 )

    Select RetSeq = N+1
          ,RetVal = D 
     From  cte3,cte0 
     Where D<=@R2
)
/*
Max 100 million observations -- Date Parts YY QQ MM WK DD HH MI SS
Syntax:
Select * from [dbo].[udf-Range-Date]('2016-10-01','2020-10-01','YY',1) 
Select * from [dbo].[udf-Range-Date]('2016-01-01','2017-01-01','MM',1) 
*/

需要的功能

$car->type()

Answer 2

如果您不想要UDF，则另一个选项是ad-hoc计数表

Declare @YourTable table (Filmtitle varchar(100),startTime datetime,duration int)
Insert Into @YourTable values
('WW2''s most daring raids','2016-10-03 00:00:00.000',60)

Select A.Filmtitle
      ,SomeName=DateAdd(MI,RN,startTime)
      ,A.duration
 From @YourTable A
 Join (
        Select RN=Row_Number() over (Order By (Select Null))
         From (Select N=1 From (Values(1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) N(N)) A
         Join (Select N=1 From (Values(1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) N(N)) B on 1=1
       ) B on 1=1
 Where B.RN<A.duration

返回

Filmtitle               SomeName                duration
WW2's most daring raids 2016-10-03 00:00:00.000 60
WW2's most daring raids 2016-10-03 00:01:00.000 60
WW2's most daring raids 2016-10-03 00:02:00.000 60
---
WW2's most daring raids 2016-10-03 00:57:00.000 60
WW2's most daring raids 2016-10-03 00:58:00.000 60
WW2's most daring raids 2016-10-03 00:59:00.000 60

Answer 3

您也可以试试这个。我们的想法是将持续时间转换为从1开始到等于-1的等效行数。然后将row_number添加到startdate。

declare @table table(Film varchar(50), StartDate datetime, duration int)
insert into @table values
('WW2''s most daring raids', '2016-10-03 00:00:00.000', 60)


;with cte as(
    select Film, StartDate, cast(Replicate('<k>1</k>', Duration-1) as xml) as x
    from @table
)
, cte2 as(
  select Film, startdate, 
  ROW_NUMBER() over(partition by Film, StartDate order by (select null)) as RN
  from cte 
  outer apply x.nodes('/k') t(Dur)
) 
select Film, Startdate, dateadd(second, RN, StartDate) as EndDate
from cte2 as a

根据SQL Server的持续时间，按日期间隔分割日期时间间隔

3 个答案: