大致错误如：ERROR 1055 (42000): Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column ‘aaa.test.age’ which is not functionally dependent on columns in GROUP BY clause;
this is incompatible with sql_mode=only_full_group_by
一般是执行类似如下语句报错：
mysql> select * from customers group by age;
解决方法：
1、登陆mysql服务器，执行以下两条命令，在global与session级都修改；
mysql> 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’;
mysql> 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’;
2、同时，在my.cnf文件的[mysqld]字段中，指定sql_mode的值：
[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
以上两种方法同时执行后，不用重启mysql
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注：我只修改了第1步即可成功执行了
原文链接：https://www.cnblogs.com/weiyiming007/p/10025181.html