조회수 랜덤함수 초기화

$Search = " where (1) ";
$Search .= " and wr_is_comment = 0 and wr_datetime >= (NOW() - INTERVAL 7 DAY) ";
$SelectBoard = " select bo_table from ".$g5['board_table'];
$QueryBoard = sql_query($SelectBoard);
while($RowBoard = sql_fetch_array($QueryBoard)){ $ResultSelect[] = "( select *, '".$RowBoard['bo_table']."' as bo_table from ".$g5['write_prefix'].$RowBoard['bo_table'].$Search." )"; }
$ResultQuery = implode(" union all ", $ResultSelect);
$ResultQuery .= " order by rand() limit 10 ";
$Query = sql_query($ResultQuery);
while($Row = sql_fetch_array($Query)){
 $Rand = rand(1, 50);
    sql_query(" update ".$g5['write_prefix'].$Row['bo_table']." set wr_hit = wr_hit+".$Rand." where wr_id = ".$Row['wr_id']." ");
}