$query = "select unix_timestamp(now())- unix_timestamp(timestamp) from test;

               $query1= $dbh->prepare($query);

        $query1->execute();

               
        while(@row_time = $query1->fetchrow_array()){
          $old_time=$row_time[0];
        }

          $tt= localtime($old_time);
           

         $quer= $dbh->do("insert into test1 values(" . $tt .")");


        print "$quer";

        $dbh->disconnect;

        exit(0);