You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'order by
                e.id' at line 9<br/>: select 
                p.* 
            from 
                ed_cursos_profesores_extra e
            left join 
                ed_profesores p on e.id_proefesor = p.id 
            where 
                e.id_curso = 
            order by
                e.id