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select * from `p8_memberdata` where regdate between (unix_timestamp(now())-86440) and now()
select * from `p8_memberdata` where date_format(from_unixtime(regdate),'%y-%m-%d')= date_format(now(),'%y-%m-%d') order by uid desc
第一条最好显示过去24小时过去1周等
第二条获得当天信息bitscn.com