Fatal error: Uncaught mysqli_sql_exception: Unknown column 'c' in 'where clause' in /var/www/uffs/Manager/Atualiza.php:36 Stack trace: #0 /var/www/uffs/Manager/Atualiza.php(36): mysqli_query(Object(mysqli), 'select url_amig...') #1 /var/www/uffs/portal/interna.php(6): inicio() #2 {main} thrown in /var/www/uffs/Manager/Atualiza.php on line 36