最近在测试远古的一段代码，有一段数据库报错代码

[Err] 1055 - Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'otp.A.id' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

错误原因倒是很简单，Mysql5.7版本以后，默认开启ONLY_FULL_GROUP_BY。解决方法很不难，

方法1，临时方案，登录数据库执行，缺点就是数据库每次重启都要重新执行下，这谁能受

show VARIABLES LIKE 'sql_mode';
set global sql_mode='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION';

 方法2、修改my.cnf文件，在my.cnf文件中增加

sql_mode='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION'

但在/Applications/MAMP/conf/，目录内并为找到这个配置文件，就因为这个问题，最终折