Fatal error: Uncaught mysqli_sql_exception: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1 in /var/www/printekinformatica.com.ar/web/php/singleproduct_promocion.php:18 Stack trace: #0 /var/www/printekinformatica.com.ar/web/php/singleproduct_promocion.php(18): mysqli_query() #1 /var/www/printekinformatica.com.ar/web/promocion.php(98): include_once('...') #2 /var/www/printekinformatica.com.ar/web/index.php(20): include_once('...') #3 {main} thrown in /var/www/printekinformatica.com.ar/web/php/singleproduct_promocion.php on line 18