public function update($collectionName, $data)
    {
        $sql = $this->dialect->grammarUpdate($collectionName, $data);

        $stid = oci_parse($this->raw, $sql);

        oci_bind_by_name($stid, ":id", $data['id']);

        foreach ($data as $key => $value) {
            oci_bind_by_name($stid, ":".$key, $data[$key]);
        }

        $result = oci_execute($stid);

        oci_free_statement($stid);

        return $result;
    }