public function fetchAssoc($sql, $bind = array())
    {
        $stmt = $this->query($sql, $bind);
        $data = array();
        while ($row = $stmt->fetch(Zend_Db::FETCH_ASSOC)) {
            $tmp = array_values(array_slice($row, 0, 1));
            $data[$tmp[0]] = $row;
        }
        return $data;
    }