SQL Server - 根据前300行（和301+）对列进行求和

Question

我从带有25个列标题的百万行表中提取数据。我有一个简单的查询，可以按日期提取已接听的总呼叫数和总连接数。

SELECT
convert(date,format(Dateadd(hh,1,[Start Time]),'dd/MM/yyyy'),103) as [Date]
,sum(iif([type] = 'normal operator call',1,0)) as [answered calls]
,sum([connected (secs)]) as [total con sec]


from inboundcallsview

where [account] = '106844'

and dateadd(hh,1,[start time]) between '2017-05-01' and '2017-06-01'

group by convert(date,format(Dateadd(hh,1,[Start Time]),'dd/MM/yyyy'),103)

我要做的是将前300个（通过[开始时间]列）已接听电话的连接秒数（[type] =＆＃39;正常的操作员电话＆＃39;）的任何一行相加每天（由[日期]栏定义）。以及从301开始的所有呼叫的总连接秒数。基本上我的当前输出是

我希望它是

忽略日期的变化6月（06）应该是（05）我搞砸了创建我的例子。我最终会想要在所有日期都这样做，所以日期参数并不重要。

提前致谢。

Answer 1

在psuedo代码中，它将如下所示：

WITH CTE AS (
  SELECT {Your Date Output} AS [date],
         ,[ConnectedSecs]
         ROW_NUMBER() OVER (PARTITION BY {Your Date Output}, ORDER BY [Start Time]) AS rn
  FROM YourTable
  WHERE {Conditions}
)
SELECT 
  [date],
  'First 300' AS Bracket,
  SUM(ConnectedSecs)
  FROM CTE WHERE rn < 301
  GROUP BY [date]
UNION ALL SELECT 
  [date],
  '301+' AS Bracket,
  SUM(ConnectedSecs)
  FROM CTE WHERE rn >= 301
  GROUP BY [date]
ORDER BY [date],{a case expression to have 'First 300' on top if desired}