
select * from table where unix_timestamp(`atime`) betweeen unix_timestamp('2017-08-22 10:00:00') and unix_timestamp('2017-08-22 12:00:00')
if($u_endtime<time()){$sql = "update dbname set u_group = 1 where ?=?"
$re = mysql_query($sql)
}
if($u_endtime<time()){
M("dbname")->where(?=?)->setfield("u_group",1)
}
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