====== クエリ結果に自動采番  ======
MySQL/oracleのrow_numberっぽい動き も参考

====== サンプルソース  ======
<code>
public function test() {
   $sql = "SET @r=0";
   $this->Ranking->query($sql);

   $sql = "SELECT (@r:=@r+1) as row, id, name, (victory/games) as victory_rate, image_url, team_info_id
           FROM users
           WHERE games > ?
           ORDER BY victory_rate DESC
           LIMIT ?";
   $val = $this->Ranking->query($sql, array(0, 100));

debug($val);
}
</code>