MYSQL5.7版本sql_mode=only_full_group_by问题

报错信息：

[Err] 1055 – Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column ‘information_schema.PROFILING.SEQ’ which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

出现以上错误时进放MySQL命令行查看一下sql_mode值：

select @@global.sql_mode

如结果如下：

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

则需要重新设置sql_mode, 在 MySQL命令行执行下面的命令：

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';

出错原因：

mysql5.7.x版本，默认是开启了 only_full_group_by 模式的，但开启这个模式后，原先的 group by 语句就出现该错误。