Fatal error: Uncaught mysqli_sql_exception: Unknown column 'con' in 'where clause' in /home/ascensod/public_html/mostrarNota.php:17
Stack trace:
#0 /home/ascensod/public_html/mostrarNota.php(17): mysqli->query('select id from ...')
#1 {main}
thrown in /home/ascensod/public_html/mostrarNota.php on line 17