MySQL 错误： BY clause; this is incompatible with sql_mode=only_full_group_by

1. sudo vim /etc/mysql/my.cnf
2. 在文件底部粘贴下面代码：

[mysqld]
sql_mode='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION'

3. 保存退出 vim
4. 重启 MySQL： sudo service mysql restart