使用数据库数据查询的时候出现下列问题：
SQLSTATE[42000]: Syntax error or access violation: 1055 Expression #1 of SELECT list is not in GROUP
SQLSTATE[42000]: Syntax error or access violation: 1055 Expression #2 of SELECT list is not in GROUP
SQLSTATE[42000]: Syntax error or access violation: 1055 Expression #3 of SELECT list is not in GROUP
MySQL8.0.2 语句如下： select user_id, user_name from t_user group by user_id;
解决方法参考地址：
