--如果还有今天以后的数据

--一周内呢
SELECT * FROM TB WHERE datediff(dd,DATE_TIME,getdate()) between 0 and 7

--从现在起往前算24小时内的呢？
SELECT * FROM TB WHERE datediff(hh,DATE_TIME,getdate()) between 0 and 23

sql语句查询某一天数据