Fatal error: Uncaught mysqli_sql_exception: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '))' at line 6 in /var/www/html/graph/graphMvsK.php:154 Stack trace: #0 /var/www/html/graph/graphMvsK.php(154): mysqli->query() #1 {main} thrown in /var/www/html/graph/graphMvsK.php on line 154