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 ',
union all select '2007-1-1 21:31:25 ',
union all select '2007-1-1 15:31:25 ',
union all select '2007-1-2 19:31:25 ',
union all select '2007-1-3 15:31:25 ',
union all select '2007-1-3 21:31:25 ',
--按日统计
select 日期时间=convert(char(), 日期时间, ), 数量=sum(数量)
from T
group by convert(char(), 日期时间, )
--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(), 日期时间, ), 数量=sum(数量)
from T
group by convert(char(), 日期时间, )
　　实例：
　　按日统计
　　select sum(cniTicketCount) as STickCount,Convert(varchar(),cnAppDate,) as ScnAppDate from
(select B.*,U.UserName from SystemUsers U inner join BookingDetails B on U.AutoID=B.cnvcApplyMan
where B.cniTicketCount> and B.cnAppDate between '2010/09/01' and '2010/10/01') as A
group by Convert(varchar(),cnAppDate,)

　　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>) as A
group by datepart(week,cnAppDate)

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