DateTimedt = DateTime.Now; //当前时间DateTimestartWeek = dt.AddDays(1- Convert.ToInt32(dt.DayOfWeek.ToString("d"))); //...

获取当前日期的上个月的日期1<?php2/**3*参考有:4*http://www.oschina.net/code/snippet_96541_40155*http://stackoverflow.com/questions/5489502/how-to-get-previous-month-and-year-...

当前月<?php$thismonth=date('m');$thisyear=date('Y');$startDay=$thisyear.'-'.$thismonth.'-1';$endDay=$thisyear.'-'.$thismonth.'-'.date('t',strtotime($startDay));...

今天select*from表名whereto_days(时间字段名)=to_days(now());昨天Select*FROM表名WhereTO_DAYS(NOW())-TO_DAYS(时间字段名)<=17天Select*FROM表名whereDATE_SUB(CURDATE(),INTERVAL7DAY)<...