sql遍历结果/分组/排序 [英] sql loop through results / group by / sort

问题描述

这是我上一篇文章的后续问题

this is a follow on question from my previous post

我有以下代码将查询我们的代理在特定时间登录的数据库.它在给定的一天工作得很好，但我现在需要在选定的时间段内进行.我不知道从哪里开始调整这个！我需要按日期和小时分组的结果......所以它看起来如下

I have the following code which will query a database of when our agents were logged on at a particular time. It works nicely for a given day, but I need to now do it for a selected time period. I am not sure where to start to adjust this! I'd need the results grouped by date and hour... so it would look as follows

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

因此将显示所选范围内每个日期的 24 小时周期.

So the 24 hour period would be displayed for each date within the selected range.

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！?非常感谢

any ideas!? Many thanks

推荐答案

类似这样的事情(未彻底测试)

Something like this (not thoroughly tested)

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:如果您认为要检查的时间间隔超过 2048 小时，则应使用数字表而不是 master..spt_values.

Note: If you think that your time interval you are checking against is more than 2048 hours you should use a numbers table instead of master..spt_values.

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