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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 1 in /var/www/vhosts/dersimizingilizce.com/httpdocs/inc-code.php:81 Stack trace: #0 /var/www/vhosts/dersimizingilizce.com/httpdocs/inc-code.php(81): mysqli->query() #1 /var/www/vhosts/dersimizingilizce.com/httpdocs/course-detail.php(654): showData() #2 {main} thrown in /var/www/vhosts/dersimizingilizce.com/httpdocs/inc-code.php on line 81