Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 3065 Expression #1 of ORDER BY clause is not in SELECT list, references column 'gw_new_library.l.level_order' which is not in SELECT list; this is incompatible with DISTINCT in /data/var/www/vhosts/gwptc.edu.et/httpdocs/main_site/library0/occupation.php:64 Stack trace: #0 /data/var/www/vhosts/gwptc.edu.et/httpdocs/main_site/library0/occupation.php(64): PDOStatement->execute() #1 {main} thrown in /data/var/www/vhosts/gwptc.edu.et/httpdocs/main_site/library0/occupation.php on line 64