Fatal error: Uncaught mysqli_sql_exception: Unknown column 'id' in 'field list' in /usr/www/users/ixorip/sep4u.gr/sxoles/kladoi2.php:13 Stack trace: #0 /usr/www/users/ixorip/sep4u.gr/sxoles/kladoi2.php(13): mysqli_query() #1 {main} thrown in /usr/www/users/ixorip/sep4u.gr/sxoles/kladoi2.php on line 13