sqlserver 按日、周、月统计方法

摘自于网络网络：http://blog.csdn.net/wanmdb/article/details/8080636

create table T(日期时间 datetime, 数量 int) 
insert T select '2007-1-1 19:31:25 ', 56 
union all select '2007-1-1 21:31:25 ', 35 
union all select '2007-1-1 15:31:25 ', 43 
union all select '2007-1-2 19:31:25 ', 34 
union all select '2007-1-3 15:31:25 ', 35 
union all select '2007-1-3 21:31:25 ', 65 
--按日统计 
select 日期时间=convert(char(10), 日期时间, 120), 数量=sum(数量) 
from T 
group by convert(char(10), 日期时间, 120) 
--按周统计 
select 日期时间=datepart(week, 日期时间), 数量=sum(数量) 
from T 
where year(日期时间)=year(getdate()) 
group by datepart(week, 日期时间) 
--按月统计 
select 日期时间=convert(char(7), 日期时间, 120), 数量=sum(数量) 
from T 
group by convert(char(7), 日期时间, 120) 
　　实例：
　　按日统计
　　select sum(cniTicketCount) as STickCount,Convert(varchar(10),cnAppDate,23) as ScnAppDate from 
(select B.*,U.UserName from SystemUsers U inner join BookingDetails B on U.AutoID=B.cnvcApplyMan
where B.cniTicketCount>0 and B.cnAppDate between '2010/09/01' and '2010/10/01') as A
group by Convert(varchar(10),cnAppDate,23)

　　按周统计
　　select sum(cniTicketCount) as STickCount,datepart(week,cnAppDate)as ScnAppDate from 
(select B.*,U.UserName from SystemUsers U inner join BookingDetails B on U.AutoID=B.cnvcApplyMan
Where B.cniTicketCount>0) as A
group by datepart(week,cnAppDate)

　　按月统计
　　select sum(cniTicketCount) as STickCount,substring(Convert(varchar(10),cnAppDate,23),1,7) as ScnAppDate from 
(select B.*,U.UserName from SystemUsers U inner join BookingDetails B on U.AutoID=B.cnvcApplyMan
Where B.cniTicketCount>0) as A
group by substring(Convert(varchar(10),cnAppDate,23),1,7)