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Fatal error: Uncaught PDOException: SQLSTATE[42000]: Syntax error or access violation: 1064 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 'order by principal desc' at line 1 in /home/gocursos/public_html/curso_realizado.php:87 Stack trace: #0 /home/gocursos/public_html/curso_realizado.php(87): PDO->prepare('\r\n ...') #1 {main} thrown in /home/gocursos/public_html/curso_realizado.php on line 87