Sql 我如何评估这张表？

我需要第二张桌子

CREATE TABLE #Temp (VisitingCount int, [Time] int, [Date] nvarchar(50) )
DECLARE @DateNow DATETIME,@i int,@Time int, @Date nvarchar(50)
set @DateNow='00:00'  
set @i=1;  
while(@i<48)  
    begin  
        set @DateNow = DATEADD(minute, 30, @DateNow)
        set @Time = (datepart(hour,@DateNow)*60+datepart(minute,@DateNow))/30 
        set @Date = CONVERT(VARCHAR(5),@DateNow, 108)
        insert into #Temp(VisitingCount,[Time],[Date]) values(0,@Time,@Date )
        set @i=@i+1
    end

select * from #Temp
---------------------------------------------------------------------------

select Sum(VisitingCount) as VisitingCount, Date
from (
  select Sum(VisitingCount) as VisitingCount, [Time],Date
    from #Temp group by [Time],Date
  Union All
    select count(page) as VisitingCount, 
    (datepart(hour,Date)*60+datepart(minute,Date))/30 as [Time], CONVERT(VARCHAR(5),Date, 108) as Date
    from scr_SecuristLog
    where Date between '2009-05-12' and '2009-05-13'
    GROUP BY (datepart(hour,Date)*60+datepart(minute,Date))/30,CONVERT(VARCHAR(5),Date, 108)
  ) X
group by Date
order by 2 asc  

CREATE TABLE#Temp（访问计数整数，[Time]int，[Date]nvarchar（50））
声明@DateNow DATETIME、@i int、@Time int、@Date nvarchar（50）
设置@DateNow='00:00'
设置@i=1；
while（@i创建第二个表，并使用该表插入其中

select left(Date,2)+':00' as Date, sum(VCount) as VCount
from Table1
group by left(Date,2)

下面是一些示例代码，解释了如何使用CASE语句，您应该能够了解如何在代码中进行更改

--sample data
create table #temp (SomeDate datetime)
insert #temp values ( '2009-05-12 11:13:19.667')
insert #temp values ( '2009-05-12 11:12:19.667')
insert #temp values ( '2009-05-12 11:33:19.667')
insert #temp values ( '2009-05-12 11:43:19.667')
insert #temp values ( '2009-05-12 11:03:19.667')
insert #temp values ( '2009-05-12 11:53:19.667')
insert #temp values ( '2009-05-12 11:53:19.667')
insert #temp values ( '2009-05-12 11:23:19.667')

insert #temp values ( '2009-05-12 12:13:19.667')
insert #temp values ( '2009-05-12 12:12:19.667')
insert #temp values ( '2009-05-12 13:33:19.667')
insert #temp values ( '2009-05-12 13:43:19.667')
insert #temp values ( '2009-05-12 14:03:19.667')
insert #temp values ( '2009-05-12 14:53:19.667')
insert #temp values ( '2009-05-12 15:53:19.667')
insert #temp values ( '2009-05-12 15:23:19.667')



--this is the grouping/count query
select count(*),case when datepart(mi,Somedate) < 30 
then dateadd(hh, datediff(hh, 0, Somedate)+0, 0)
 else dateadd(mi,30,dateadd(hh, datediff(hh, 0, Somedate)+0, 0)) end
from #temp
group by case when datepart(mi,Somedate) < 30 
then dateadd(hh, datediff(hh, 0, Somedate)+0, 0)
 else dateadd(mi,30,dateadd(hh, datediff(hh, 0, Somedate)+0, 0)) end

你想问个问题吗？他想知道如何在半小时内将他的SQL改为求和。不过，你比我更有耐心，我们都会说通用的代码语言；）
select Somedate,case when datepart(mi,Somedate) < 30 
then dateadd(hh, datediff(hh, 0, Somedate)+0, 0)
 else dateadd(mi,30,dateadd(hh, datediff(hh, 0, Somedate)+0, 0)) end
from #temp

vCount  time
4   2009-05-12 11:00:00.000
4   2009-05-12 11:30:00.000
2   2009-05-12 12:00:00.000
2   2009-05-12 13:30:00.000
1   2009-05-12 14:00:00.000
1   2009-05-12 14:30:00.000
1   2009-05-12 15:00:00.000
1   2009-05-12 15:30:00.000