mysql5.7执行sql语句报错：In aggregated query without GROUP BY, expression #1 of SELECT list contains nonagg

报错

mysql5.7执行sql语句报错：In aggregated query without GROUP BY, expression #1 of SELECT list contains nonaggregated column 'yunva_changke.u.user_id'; this is incompatible with sql_mode=only_full_group_by

如图

解决方案：

1.编辑/etc/my.cnf文件 如图   2.重启mysql服务