sql如何取某年某月的第一天和最后一天 SELECT CAST((LEFT('20093',4)+'-'+SUBSTRING('20093',5,LEN('20093'))+'-'+'01')AS DATETIME)-第一天SELECT DATEADD(DAY,-1,DATEADD(MONTH,1,CAST((LEFT('20093',4)+'-'+SUBSTRING('20093',5,LEN('20093'))+'-'+'01')AS DATETIME)))-最后一2113天原理:第一天肯定是1号拉5261,最后一天是下个月第4102一天减1653一天。本月第一天SELECT dateadd(ms,-1,DATEADD(mm,DATEDIFF(m,0,getdate()),0))as mouthlastdate下月第一天:SELECT dateadd(ms,-1,DATEADD(mm,DATEDIFF(m,0,getdate())+1,0))as mouthlastdate下下月第一天:SELECT dateadd(ms,-1,DATEADD(mm,DATEDIFF(m,0,getdate())+2,0))as mouthlastdate扩展资料sqlserver 时间格式函数详细getdate 获取当前时间select getdate()dateadd 原有时间加:2013-02-17 13:20:16 此时间加12个月select dateadd(MONTH,12,'2013-02-17 13:20:16')-2014-02-17 13:20:16.000(参数month可以改为 day,year等日期加相应的值)datediff 两个时间的差(后面-前面=返回值)select datediff(day,'2013-02-01','2013-02-18')-17(参数day可以改为 month,year等日期加相应的值)datepart 获取日期的某个。
sql查询某年各个月最后一天的记录 我写了下面的语句2113供你参考,涉及到5261的内容:1、cast()数据类型转换2、转4102义字符1653(''),两个单引号代表一个单引号3、while 循环4、union all 查询连接 declare@day intdeclare@month intdeclare@year intdeclare@date_string varchar(20)declare@checktime_start datetimedeclare@checktime_end datetimedeclare@sql varchar(2048)set@year=2009set@month=2set@sql=''while(@month)beginselect@date_string=cast(@year as varchar)+'-'+cast(@month as varchar)+'-'+'01'set@date_string=cast(@date_string AS DATETIME)set@checktime_end=dateadd(day,-1,@date_string)set@checktime_start=dateadd(day,-2,@date_string)-在这个地方写你要查询的内容[table]是你的表,[date]是时间列,还有别的条件你自己加set@sql=sql+'select*from[table]where[date]between '''+cast(@checktime_start AS varchar(16))+''' and '''+cast(@checktime_end AS varchar(16))+''' union all 'set@month=month+1endset@sql=sql+'select*from[table]where[date]between ''12 30 2009 12:00AM'' and ''12 31 2009 12:00AM'''print(@sql)exec@sql这个是按。
sql如何取某年某月的第一天和最后一天 declare@year int;declare@month int;set@year=2016;set@month=11;第一天select cast(@year as nvarchar(4))+'-'+right(cast((100+month)as nvarchar(3)),2)+'-01'最后一天select DATEADD(day,-1,(DATEADD(month,1,(cast(@year as nvarchar(4))+'-'+right(cast((100+month)as nvarchar(3)),2)+'-01'))))你再看看有简单写法吗