像这么的查询还有别的什么方法可写吗

public function find()    {        $sql = "SELECT * FROM qsj_user_profile        RIGHT JOIN qsj_user ON qsj_user.uid = qsj_user_profile.uid";        if(!empty($_GET['email']))        {            $sql.="AND qsj_user.email=".$_GET['email'];        }        if(!empty($_GET['nickname']))        {            $sql.="AND qsj_user_profile.nickname = ".$_GET['nickname'];        }        if(!empty($_GET['province']))        {            $sql.="AND qsj_user_profile.province =".$_GET['province'];        }        if(!empty($_GET['city']))        {            $sql.="AND qsj_user_profile.city =".$_GET['city'];        }        if(!empty($_GET['dist']))        {            $sql.="AND qsj_user_profile.dist = ".$_GET['dist'];        }        if(!empty($_GET['style']))        {            $sql.="AND qsj_user_profile.style =".$_GET['style'];        }        $query = $this->db->query($sql);        return $query->result_array();            }