组表分为15分钟

Question

T-SQL,SQL Server 2008及更高版本

给出一个样本表

 StatusSetDateTime   | UserID | Status    | StatusEndDateTime   | StatusDuration(in seconds)
============================================================================
 2012-01-01 12:00:00 | myID   | Available | 2012-01-01 13:00:00 | 3600

我需要将其分解为一个使用15分钟间隔的视图,例如:

IntervalStart       | UserID | Status | Duration

===========================================

2012-01-01 12:00:00 | myID | Available | 900 

2012-01-01 12:15:00 | myID | Available | 900

2012-01-01 12:30:00 | myID | Available | 900 

2012-01-01 12:45:00 | myID | Available | 900 

2012-01-01 13:00:00 | myID | Available | 0

etc....

现在我已经能够四处搜寻并找到了一些疑问,这将打破我发现类似的东西的MySQL 这里:

而东西T-SQL 这里

但是在第二个例子中,他们正在对结果求和,而我需要按用户按状态划分总持续时间除以间隔时间(900秒).

我能够调整第二个链接中的示例,将所有内容拆分为间隔,但返回总持续时间,我无法弄清楚如何将间隔持续时间分割(并且仍然总计为原始持续时间总和).

提前感谢任何见解!

编辑:第一次尝试

 ;with cte as 
    (select MIN(StatusDateTime) as MinDate
          , MAX(StatusDateTime) as MaxDate
          , convert(varchar(14),StatusDateTime, 120) as StartDate
          , DATEPART(minute, StatusDateTime) /15 as GroupID
          , UserID
          , StatusKey
          , avg(StateDuration) as AvgAmount
     from AgentActivityLog
     group by convert(varchar(14),StatusDateTime, 120)
         , DATEPART(minute, StatusDateTime) /15
         , Userid,StatusKey)

  select dateadd(minute, 15*GroupID, CONVERT(datetime,StartDate+'00'))
         as [Start Date]
       , UserID, StatusKey, AvgAmount as [Average Amount]
  from cte

编辑:第二次尝试

;With cte As
   (Select DateAdd(minute
                   , 15 * (DateDiff(minute, '20000101', StatusDateTime) / 15)
                   , '20000101') As StatusDateTime
         , userid, statuskey, StateDuration
    From AgentActivityLog)

 Select StatusDateTime, userid,statuskey,Avg(StateDuration)
 From cte
 Group By StatusDateTime,userid,statuskey;

Answer 1

;with cte_max as 
(
   select dateadd(mi, -15, max(StatusEndDateTime)) as EndTime, min(StatusSetDateTime) as StartTime
   from AgentActivityLog
), times as
(
    select StartTime as Time from cte_max
    union all
    select dateadd(mi, 15, c.Time)
    from times as c
        cross join cte_max as cm
    where c.Time <= cm.EndTime
)
select
    t.Time, A.UserID, A.Status,
    case
        when t.Time = A.StatusEndDateTime then 0
        else A.StatusDuration / (count(*) over (partition by A.StatusSetDateTime, A.UserID, A.Status) - 1)
    end as Duration
from AgentActivityLog as A
    left outer join times as t on t.Time >= A.StatusSetDateTime and t.Time <= A.StatusEndDateTime

sql fiddle demo