本文介绍了SQL Server组按DateTime每小时计数?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
create table #Events
(
EventID int identity primary key,
StartDate datetime not null,
EndDate datetime not null
)
go
insert into #Events (StartDate, EndDate)
select '2007-01-01 12:44:12 AM', '2007-01-01 12:45:34 AM' union all
select '2007-01-01 12:45:12 AM', '2007-01-01 12:46:34 AM' union all
select '2007-01-01 12:46:12 AM', '2007-01-01 12:47:34 AM' union all
select '2007-01-02 5:01:08 AM', '2007-01-02 5:05:37 AM' union all
select '2007-01-02 5:50:08 AM', '2007-01-02 5:55:59 AM' union all
select '2007-01-03 4:34:12 AM', '2007-01-03 4:55:18 AM' union all
select '2007-01-07 3:12:23 AM', '2007-01-07 3:52:25 AM'
(抱歉,,用于收集他们的基本sql)
(with apologies to http://www.sqlteam.com/article/working-with-time-spans-and-durations-in-sql-server for harvesting their base sql)
我正在尝试查找一小时内发生的事件计数,因此结果设置将如下所示:
I am trying to find the count of Events that occurred in an hour, so the result set would look like this:
2007-01-01 12:00 3
2007-01-02 5:00 2
2007-01-03 4:00 1
2007-01-07 3:00 1
我已经玩了dateadd和round和分组,但没有得到它。可以帮助吗?
I have been playing with dateadd and round and grouping but not getting it. Can anyone help?
谢谢。
推荐答案
假设SQL Server 2008:
How about this? Assuming SQL Server 2008:
SELECT CAST(StartDate as date) AS ForDate,
DATEPART(hour,StartDate) AS OnHour,
COUNT(*) AS Totals
FROM #Events
GROUP BY CAST(StartDate as date),
DATEPART(hour,StartDate)
2008年前:
SELECT DATEADD(day,datediff(day,0,StartDate),0) AS ForDate,
DATEPART(hour,StartDate) AS OnHour,
COUNT(*) AS Totals
FROM #Events
GROUP BY CAST(StartDate as date),
DATEPART(hour,StartDate)
这导致:
ForDate | OnHour | Totals
-----------------------------------------
2011-08-09 00:00:00.000 12 3
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