常用的获取时间差的sql语句 "select count(*) from [注册] where datediff(day,time,getdate())<1";//获取当天注册人员数 sql="select id,classid,classname,xiaoshoue,xiaoshou,jinhuo,kucun,addtime " sql=sql&" from xiaoshou where addtime between '" & format(starttime,"yyyy-mm-dd") & "' and '" & format(endtime,"yyyy-mm-dd") & "'" sql=sql&" order by id desc" Select Fylb,Pm,Gg,Dw,Dj,Sl,Je FROM cqyzypzx where zxdate between {^2003-7-1}and {^2003-8-1} 近两个星期 sql="select * from table where datediff(week,riqi,getdate())<=2" 近三个月 sql="select * from table where datediff(month,riqi,getdate())<=3" 近一年 sql="select * from table where datediff(year,riqi,getdate())<=1" Apply_Date between #"& startdate &" 23:59:59# and #"& enddate &" 23:59:59#" 参考以下日期写法 ---求相差天数 select datediff(day,'2004-01-01',getdate()) 转贴: --1.一个月第一天的 SELECT DATEADD(mm, DATEDIFF(mm,0,getdate()), 0) --2.本周的星期一 SELECT DATEADD(wk, DATEDIFF(wk,0,getdate()), 0) select dateadd(wk,datediff(wk,0,getdate()),6) --3.一年的第一天 SELECT DATEADD(yy, DATEDIFF(yy,0,getdate()), 0) --4.季度的第一天 SELECT DATEADD(qq, DATEDIFF(qq,0,getdate()), 0) --5.当天的半夜 SELECT DATEADD(dd, DATEDIFF(dd,0,getdate()), 0) --6.上个月的最后一天 SELECT dateadd(ms,-3,DATEADD(mm, DATEDIFF(mm,0,getdate()), 0)) --7.去年的最后一天 SELECT dateadd(ms,-3,DATEADD(yy, DATEDIFF(yy,0,getdate()), 0)) --8.本月的最后一天 SELECT dateadd(ms,-3,DATEADD(mm, DATEDIFF(m,0,getdate())+1, 0)) --9.本年的最后一天 SELECT dateadd(ms,-3,DATEADD(yy, DATEDIFF(yy,0,getdate())+1, 0)) --10.本月的第一个星期一 select DATEADD(wk, DATEDIFF(wk,0,dateadd(dd,6-datepart(day,getdate()),getdate())), 0) --查询本周注册人数 select count(*) from [user] where datediff(week,create_day-1,getdate())=0 --上周注册人数 select count(*) from [user] where datediff(week,create_day-1,getdate())=1 --本月注册人数 select count(*) from [user] where datediff(month,create_day,getdate())=0 --上月注册人数 select count(*) from [user] where datediff(month,create_day,getdate())=1 --如果要效率,这样写查询 --查询本周注册人数 select count(*) from [user] where create_day>=dateadd(day,2-datepart(weekday,getdate()),convert(varchar,getdate(),112)) and create_day =dateadd(day,-5-datepart(weekday,getdate()),convert(varchar,getdate(),112)) and create_day =dateadd(day,1-day(getdate()),convert(varchar,getdate(),112)) and create_day =dateadd(month,-1,dateadd(day,1-day(getdate()),convert(varchar,getdate(),112))) and create_day