从15分钟间隔到每小时间隔计数

Question

我正在使用Excel工作表通过此查询显示来自sql的数据

SELECT itable.Timestamp, itable.Time,
Sum(itable.CallsOffered)AS CallsOffered, Sum(itable.CallsAnswered)AS CallsAnswered, Sum(itable.CallsAnsweredAftThreshold)AS CallsAnsweredAftThreshold,
sum(CallsAnsweredDelay)AS CallsAnsweredDelay 
FROM tablename itable
WHERE 
(itable.Timestamp>=?) AND (itable.Timestamp<=?) AND 
(itable.Application in ('1','2','3','4'))
GROUP BY itable.Timestamp, itable.Time
ORDER BY itable.Timestamp, itable.Time

我得到这样的间隔为15分钟的数据：

Timestamp   Time    CallsOffered    CallsAnswered   CallsAnsweredAftThreshold   CallsAnsweredDelay
6/1/2014 0:00   00:00   0   1   1   52
6/1/2014 0:15   00:15   3   1   1   23
6/1/2014 0:30   00:30   3   3   2   89
6/1/2014 0:45   00:45   0   0   0   0
6/1/2014 1:00   01:00   0   0   0   0
6/1/2014 1:15   01:15   4   1   1   12
6/1/2014 1:30   01:30   1   1   1   39
6/1/2014 1:45   01:45   0   0   0   0
6/1/2014 2:00   02:00   2   1   0   7
6/1/2014 2:15   02:15   1   1   1   80
6/1/2014 2:30   02:30   3   2   2   75
6/1/2014 2:45   02:45   0   0   0   0
6/1/2014 3:00   03:00   0   0   0   0

我想将间隔从15分钟转换为每小时间隔

2014-07-01 00:00:00.000
2014-07-01 01:00:00.000
2014-07-01 02:00:00.000
2014-07-01 03:00:00.000
2014-07-01 04:00:00.000
2014-07-01 05:00:00.000
2014-07-01 06:00:00.000
2014-07-01 07:00:00.000
2014-07-01 08:00:00.000
2014-07-01 09:00:00.000
2014-07-01 10:00:00.000
2014-07-01 11:00:00.000
2014-07-01 12:00:00.000
2014-07-01 13:00:00.000
2014-07-01 14:00:00.000

我想出的查询是：

select 
  timestamp = DATEADD(hour,datediff(hour,0,app.Timestamp),0),
  Sum(app.CallsOffered)AS CallsOffered,
  Sum(app.CallsAnswered)AS CallsAnswered,
  Sum(app.CallsAnsweredAftThreshold)AS CallsAnsweredAftThreshold,
  sum(CallsAnsweredDelay)AS CallsAnsweredDelay,
  max(MaxCallsAnsDelay) as MaxCallsAnsDelay , 
  max(app.MaxCallsAbandonedDelay)as MaxCallsAbandonedDelay
from tablename app
where Timestamp >='2014-7-1' AND timestamp<='2014-7-2' and 

(app.Application in (
'1',
'2',
'3',
'4')
group by DATEADD(hour,datediff(hour,0,Timestamp),0)
order by Timestamp;

当我在Microsoft Sql Server Managment Studio中运行时，我得到了想要的结果，但是当我尝试在excel中的Microsoft Query中运行相同的查询时，它给了我一个很长的错误，该错误就像我无法从时间戳开始，这给了我错误对于DATEADD，DATEDIFF，有什么我应该在我的查询中更改的方法，或者我可以做的任何事情以获得小时计数间隔，而不是如我所显示的15分钟计数间隔，在此先感谢您