php ... حَصل خطأ

معلومات تقنية
نوع الخطأ256
وصف الخطأExpression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'ex4arab_sites.vtp_members.member_since' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by
ملف الخطأ/home/ex4arab/public_html/status/connections/MySQLiConnection.php
سطر ال خطأ142
استخبار SQLSELECT COUNT(`id`) as `total`, DATE_FORMAT(member_since,'%M, %Y') as `months`, year(member_since) as `year`, MONTH(member_since) as `MONTH` FROM `vtp_members` GROUP BY MONTH(member_since),year(member_since) LIMIT 1

More info