当天：
select * from T_news where datediff(day,addtime,getdate())=0最近三天：
select * from T_news where datediff(day,addtime,getdate())<= 2 and datediff(day,addtime,getdate())>= 0本周：
select * from T_news WHERE (DATEPART(wk, addtime) = DATEPART(wk, GETDATE())) AND (DATEPART(yy, addtime) = DATEPART(yy, GETDATE()))
注意：此时不能用 datediff 差值为7,因为，datediff只表示间隔数本月：
select * from T_news WHERE (DATEPART(yy, addtime) = DATEPART(yy, GETDATE())) AND (DATEPART(mm, addtime) = DATEPART(mm, GETDATE()))最近一个月：
select * from T_news WHERE (DATEPART(yy, addtime) = DATEPART(yy, GETDATE()))
AND ((DATEPART(mm, addtime) = DATEPART(mm, GETDATE())) OR (31-DATEPART(DD,addtime)+DATEPART(DD, GETDATE()))<=31)本季度：
select * from T_news where DATEPART(qq, addtime) = DATEPART(qq, GETDATE()) and DATEPART(yy, addtime) = DATEPART(yy, GETDATE())Sql Server中查询当天，最近三天，本周，本月，最近一个月，本季度的数据的sql语句
原文：https://www.cnblogs.com/python99/p/12248079.html