如何在SQL中按小时显示事件？

Question

Create table tblEvent (Event_ID int, Start_Time datetime, End_Time datetime) 

insert into tblEvent values(1,'2015-02-10 9:00:00.000','2015-02-10 11:00:00.000') 
insert into tblEvent values(2,'2015-02-10 11:00:00.000','2015-02-10 11:20:00.000') 
insert into tblEvent values(3,'2015-02-10 11:20:00.000','2015-02-10 13:00:00.000') 

，并希望成为像显示下面

Hour Event_ID [Start_End] 
9  1   9:00-10:00 
10 1   10:00-11:00 
11 2   11:00-11:20 
11 3   11:20-12:00 
12 3   12:00-13:00 

，我们可以使事件的END_TIME 3变成13:30 我们必须要显示

13 3   13:00-13:30 

谁能帮助我？

Answer 1

可以使用DATEPART函数

DATEPART(HOUR, [Start_End]) AS Hour 

Answer 2

select blocks.Hour, e.Event_Id, 
    format(case when e.Start_Time > blocks.Start_Time then e.Start_Time else blocks.Start_Time end, 'HH:mm') + 
    '-' + 
    format(case when e.End_Time < blocks.End_Time then e.End_Time else blocks.End_Time end, 'HH:mm') 
from 
    tblEvent as e inner join 
    (
    select 
     d0.n + d1.n * 4 as Hour, 
     dateadd(hh, d0.n + d1.n * 4,  cast(cast(current_timestamp as date) as datetime)) as Start_Time, 
     dateadd(hh, d0.n + d1.n * 4 + 1, cast(cast(current_timestamp as date) as datetime)) as End_Time 
    from 
     (select 0 as n union all select 1 union all select 2 union all select 3) as d0, 
     (select 0 as n union all select 1 union all select 2 union all select 3 union all select 4 union all select 5) as d1 
    ) as blocks 
     on blocks.End_Time > e.Start_Time and blocks.Start_Time < e.End_Time 
order by Event_Id, Hour 

这里是一个开始。 SQL Server？现在的日子够了吗？您在SQL 2008上没有format()，因此您必须自己完成这一部分。

我不确定这是否按照你想要的方式处理所有情况。你可以采取基本的想法，并在更长的时间范围内延长它，例如168周，一周。

http://sqlfiddle.com/#!6/819c0/9

Answer 3

尝试像this.This样本数据有些事情正在运行正常。

请提供至少10行的另一个示例数据，不要忘记粘贴所需的输出。

同时在脚本中阅读我的评论。

DECLARE @tblEvent TABLE (
    Event_ID INT 
    ,Start_Time DATETIME 
    ,End_Time DATETIME 
    ) 

INSERT INTO @tblEvent 
VALUES (
    1 
    ,'2015-02-10 9:00:00.000' 
    ,'2015-02-10 11:00:00.000' 
    ) 
    ,(
    2 
    ,'2015-02-10 11:00:00.000' 
    ,'2015-02-10 11:20:00.000' 
    ) 
    ,(
    3 
    ,'2015-02-10 11:20:00.000' 
    ,'2015-02-10 13:00:00.000' 
    ); 
    --select *,DATEdiff(hour,a.Start_Time,a.End_Time) from @tblEvent a 
    ; 

WITH CTE 
AS (
    SELECT * 
     ,ROW_NUMBER() OVER (
      ORDER BY Start_Time 
      ) RN 
     ,DATEdiff(hour, Start_Time, End_Time) Diff 
    FROM @tblEvent 
    ) 
    --select * from cte 
    ,CTE1 
AS (
    SELECT Event_ID 
     ,Start_Time 
     ,CASE 
      WHEN Diff > 1 
       THEN DATEADD(minute, 60 - DATEPART(minute, Start_Time), Start_Time) 
      ELSE End_Time 
      END End_Time 
     ,RN 
     ,DIFF 
     ,1 RN1 
     ,DATEPART(minute, Start_Time) DIFFMIN 
    FROM CTE 
    --WHERE RN = 1 

    UNION ALL 

    SELECT CASE 
      WHEN A.Diff > B.DIFF 
       THEN b.Event_ID 
      ELSE a.Event_ID 
      END 
     ,B.End_Time Start_Time 
     ,CASE 
      WHEN A.Diff > B.DIFF 
       THEN DATEADD(minute, 60 - DATEPART(minute, B.Start_Time), B.End_Time) 
      ELSE A.End_Time 
      END End_Time 
     ,CASE 
      WHEN A.Diff > B.DIFF 
       THEN B.RN 
      ELSE B.RN + 1 
      END RN 
     ,CASE 
      WHEN A.Diff > B.DIFF 
       THEN B.DIFF - 1 
      ELSE A.Diff 
      END 
     ,RN1 + 1 
     ,0 
    FROM CTE1 B 
    CROSS APPLY (
     SELECT * 
     FROM CTE 
     WHERE RN = B.RN 
     ) A 
    WHERE B.DIFF > 0 
    ) 
SELECT [Hour] 
    ,Event_ID 
    ,[Start_End] 
FROM (
    SELECT DATEPART(HOUR, Start_Time) [Hour] 
     ,ROW_NUMBER() OVER (
      PARTITION BY Start_Time ORDER BY Start_Time 
      ) RN2 
     ,Event_ID 
     ,CONVERT(VARCHAR(5), Start_Time, 114) + '-' + CONVERT(VARCHAR(5), End_Time, 114) [Start_End] 
    FROM CTE1 
    ) TBL 
WHERE RN2 = 1 

    --BELOW QUERY RETURN 6 ROWS 
    -- I AM TRYING TO ELIMINATE THE EXTRA ROWS WITHOUT ROW_NUMBER 
    --WHICH WOULD BE MORE OPTIMIZE,BUT I AM NOT GETTING WHAT ACTUALLY CAUSING THIS BEHAVIOUR 
    --MEANWHILE YOU CAN TEST OTHER SAMPLE DATA,AND THROW OTHER SAMPLE DATA 

    --SELECT DATEPART(HOUR, Start_Time) [Hour] 
    --  ,Event_ID 
    --  ,CONVERT(VARCHAR(5), Start_Time, 114) + '-' + CONVERT(VARCHAR(5), End_Time, 114) [Start_End] 
    -- FROM CTE1