sql 查询本周本月问题 ---查询今日信息 select * from 表名 where datediff(day,时间字段,getdate())=0 其中day可以换成其他时间函数如month等 ---求相差天数 select datediff(day,'2004-01-01',getdate()) --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,9-datepart(weekday,getdate()),convert(varchar,getdate(),112)) --上周注册人数 select count(*) from [user] where create_day>=dateadd(day,-5-datepart(weekday,getdate()),convert(varchar,getdate(),112)) and create_day<dateadd(day,2-datepart(weekday,getdate()),convert(varchar,getdate(),112)) --本月注册人数 select count(*) from [user] where 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))) --上月注册人数 select count(*) from [user] where create_day>=dateadd(month,-1,dateadd(day,1-day(getdate()),convert(varchar,getdate(),112))) and create_day<dateadd(day,1-day(getdate()),convert(varchar,getdate(),112)) --本周 select count(*) from User where datediff(dd,create_day,getdate()) <= datepart(dw,getdate()) --上周 select count(*) from User where datediff(dd,create_day,(getdate() - datepart(dw,getdate()))) <= 7 --本月 select count(*) from User where datepart(mm,create_day) = datepart(mm,getdate()) --上月 select count(*) from User where datepart(mm,create_day) = datepart(mm,getdate()) - 1 --本周 select count(*) from [User] where datediff(dd,create_day,getdate()) <= datepart(dw,getdate()) --上周 select count(*) from [User] where datediff(dd,create_day,(getdate() - datepart(dw,getdate()))) <= 7 --本月 select count(*) from [User] where datepart(mm,create_day) = datepart(mm,getdate()) --上月 select count(*) from [User] where datepart(mm,create_day) = datepart(mm,getdate()) - 1
学习 month(create_day)=month(getdate())本月 month(create_day)=month(getdate())-1 上月 补充 查询今日所有的 SELECT * from feedback WHERE (DATEDIFF(d,fedtime,GETDATE())=0) ORDER BY fedid DESC
下面的可能好些，加了判断是不是本年的，上面的本周，本月会把每年的都查出来
查询本月的记录 select * from tableName where DATEPART(mm, theDate) = DATEPART(mm, GETDATE()) and DATEPART(yy, theDate) = DATEPART(yy, GETDATE())
查询本周的记录 select * from tableName where DATEPART(wk, theDate) = DATEPART(wk, GETDATE()) and DATEPART(yy, theDate) = DATEPART(yy, GETDATE())
查询本季的记录 select * from tableName where DATEPART(qq, theDate) = DATEPART(qq, GETDATE()) and DATEPART(yy, theDate) = DATEPART(yy, GETDATE())
转载于:https://www.cnblogs.com/n666/archive/2010/10/09/2190882.html
