Fatal error: Uncaught mysqli_sql_exception: Unknown column 'c.id' in 'on clause' in /var/www/html/classi/2024_SIA_B/Gallotta/VerificaInf/ricerca.php:43 Stack trace: #0 /var/www/html/classi/2024_SIA_B/Gallotta/VerificaInf/ricerca.php(43): mysqli->query() #1 {main} thrown in /var/www/html/classi/2024_SIA_B/Gallotta/VerificaInf/ricerca.php on line 43