Fatal error: Uncaught mysqli_sql_exception: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'and c.caracter = 0 GROUP BY b.clave_de_grupo ORDER BY b.clave_de_gru' at line 7 in /var/www/html/escolar/registro/funciones/claseBaseDatos.php:48 Stack trace: #0 /var/www/html/escolar/registro/funciones/claseBaseDatos.php(48): mysqli_query(Object(mysqli), 'SELECT * \r\n\t\t\t\t...') #1 /var/www/html/escolar/registro/registro_espanol_semestral/espanol_nivel.php(41): BaseDatos->consulta('SELECT * \r\n\t\t\t\t...') #2 /var/www/html/escolar/registro/registro_espanol_semestral/elige_asignatura.php(571): include('/var/www/html/e...') #3 {main} thrown in /var/www/html/escolar/registro/funciones/claseBaseDatos.php on line 48