sql循环遍历结果/分组/排序

Question

这是我上一篇文章的后续问题，

我有以下代码，它将查询我们的代理在特定时间登录的数据库。它在某一天效果很好，但我现在需要在选定的时间段内执行此操作。我不知道从哪里开始调整！我需要按日期和时间分组的结果...因此它看起来如下所示

date        hour    count
10/10/11    22      52
10/10/11    23      24
11/10/11    00      12
11/10/11    01      33

因此将为所选范围内的每个日期显示 24 小时期限。

ALTER procedure [dbo].[LoggedOnCountByHour]
    @DayToCheck datetime,
    @HelplineID int
as

select  dateadd(hour, N.number, @DayToCheck) as [date_hour], 
        DATEPART(hh,dateadd(hour, N.number, @DayToCheck)) as [Hour],
        count(L.ExpertRecID) as [count of users]
from master..spt_values as N
  left outer join WorkDetail as L
    on L.KickedOffTime > dateadd(hour, N.number, @DayToCheck) and
       L.LoginTime < dateadd(hour, N.number + 1, @DayToCheck)
left join PoolMembership P on P.ExpertRecID = L.ExpertRecID

where N.Type = 'P' and
      N.Number between 0 and 23 and
      P.HelplinePoolID = @HelplineID 
group by dateadd(hour, N.number, @DayToCheck), DATEPART(hh,dateadd(hour, N.number, @DayToCheck) )

有什么想法吗！？ 非常感谢

Answer 1

像这样的东西（未经彻底测试）

alter procedure [dbo].[LoggedOnCountByHour]
        @FromDayToCheck datetime,
        @ToDayToCheck datetime,
        @HelplineID int
as

select  dateadd(hour, N.number, @FromDayToCheck) as [date_hour], 
        DATEPART(hh,dateadd(hour, N.number, @FromDayToCheck)) as [Hour],
        count(L.ExpertRecID) as [count of users]
from master..spt_values as N
  left outer join WorkDetail as L
    on L.KickedOffTime > dateadd(hour, N.number, @FromDayToCheck) and
       L.LoginTime < dateadd(hour, N.number + 1, @FromDayToCheck)
  left join PoolMembership P on P.ExpertRecID = L.ExpertRecID

where N.Type = 'P' and
      dateadd(hour, N.number + 1, @FromDayToCheck) <= @ToDayToCheck + 1 and
      P.HelplinePoolID = @HelplineID 
group by dateadd(hour, N.number, @FromDayToCheck), DATEPART(hh,dateadd(hour, N.number, @FromDayToCheck) )
order by [date_hour], [Hour]

注意：如果您认为您检查的时间间隔超过 2048 小时，您应该使用数字表而不是 master..spt_values。