JAVA错误： Expression #3 of SELECT list is not in GROUP BY

详细错误：

在浏览器请求接口时
There was an unexpected error (type=Internal Server Error, status=500). could not extract ResultSet; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException: could not extract ResultSet

查看console中错误：
clause and contains nonaggregated column ...
.which is not functionally dependent on columns in GROUP BY clause; 
this is incompatible with sql_mode=only_full_group_by

错误原因：对于GROUP BY聚合操作，如果在SELECT中的列，没有在GROUP BY中出现，那么这个SQL是不合法的；
解决办法：1、检测MySQL版本：select @@version;（我的MySQL版本是5.7.24）
2、（关掉ONLY_FULL_GROUP_BY），输入命令
一、

set global sql_mode='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION';
set session 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、重启MySQL(很重要！！！！)；
参考：https://blog.csdn.net/yalishadaa/article/details/72861737
https://blog.csdn.net/fansili/article/details/78664267