oracle sql日期比较:在今天之前: select * from up_date where update < to_date('2007-09-07 00:00:00','yyyy-mm-dd hh24:mi:ss')select * from up_date where update <= to_date('2007-09-07 00:00:00','yyyy-mm-dd hh24:mi:ss') 在今天只后: select * from up_date where update &
NthDayOfWeek 计算并返回指定日期是该月第几周 Unit:DateUtils function NthDayOfWeek(const AValue: TDateTime): Word; Example: Uses SysUtils,DateUtils; Begin Write('Today is the ',NthDayOfWeek(Today),'-th '); Writeln(formatdateTime('dddd',Today),' of the month.');En