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 '' at line 1 in /home2/morelia3/public_html/libreria/notas20.php:625 Stack trace: #0 /home2/morelia3/public_html/libreria/notas20.php(625): mysqli_query(Object(mysqli), 'SELECT * FROM n...') #1 /home2/morelia3/public_html/seccion.php(210): cuantasNotaSec('', Object(mysqli)) #2 {main} thrown in /home2/morelia3/public_html/libreria/notas20.php on line 625