设置MySQL的sql_mode

软件环境

MySQL版本：5.7.22

问题

错误代码： 1055
Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'my_db.d.id' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

OR

错误代码： 1055
Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'my_db.u.avatar' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

查询MySQL的sql mode

SELECT @@sql_mode;

查询结果如下(查询结果会因sql mode设置的不同，而有所区别)：

ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION

貌似在linux下安装的MySQL默认就是这种设置。（即使在/etc/my.cnf中根本没有sql_mode的设置）。

设置sql mode

windows下，查询my.ini文件,添加或修改

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

linux下，查找/etc/my.cnf，添加或修改

sql_mode = ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION

windows下，貌似经常没有“ONLY_FULL_GROUP_BY”，导致有的sql在本地测试没有问题，部署后却出现问题。
为避免此情况，开发前确认本地MySQL的sql_mode与服务器一致。