sqlserver 按日、周、月统计方法

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),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),数量=sum(数量) from T group by convert(char(7),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),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),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),7)