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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 MySQL server version for the right syntax to use near '' at line 1 in C:\Apache24\htdocs\anteriores\nominas_\controlador\prueba.php:6 Stack trace: #0 C:\Apache24\htdocs\anteriores\nominas_\controlador\prueba.php(6): mysqli->query('SELECT pkusuari...') #1 {main} thrown in C:\Apache24\htdocs\anteriores\nominas_\controlador\prueba.php on line 6