Fatal error: Uncaught mysqli_sql_exception: In aggregated query without GROUP BY, expression #1 of SELECT list contains nonaggregated column 'nited.rwthai46.stu_class'; this is incompatible with sql_mode=only_full_group_by in /var/www/html/svonline/sch_rwm02_view.php:13 Stack trace: #0 /var/www/html/svonline/sch_rwm02_view.php(13): mysqli_query() #1 {main} thrown in /var/www/html/svonline/sch_rwm02_view.php on line 13