mysql查询报错： ORDER BY clause is not in GROUP BY..this is incompatible with sql_mode=only_full_group_by

在用mysql执行如下查询的时候：

select * from `sys_user_group` group by `GROUP_ID`
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报错信息如下：

[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
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错误的原因是我mysql版本是5.7的，使用如下语句查询可知

select @@sql_mode;
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里面默认设置了

sql_mode=only_full_group_by
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only_full_group_by ：使用这个就是使用和oracle一样的group 规则, select的列都要在group中,或者本身是聚合列(SUM,AVG,MAX,MIN) 才行，其实这个配置目前个人感觉和distinct差不多的，所以去掉就好

直接修改mysql配置文件（我的系统是Ubuntu16.04的，在/etc/mysql/mysql.conf.d/mysqld.cnf 中并没有sql_mode这个配置，所以直接加上就好，如果是其他系统有得修改就不用添加了）

[mysqld]下

sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
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到此mysql配置文件的完整配置如下：

[mysqld_safe]socket          = /var/run/mysqld/mysqld.socknice            = 0[mysqld]## * Basic Settings#user            = mysqlpid-file        = /var/run/mysqld/mysqld.pidsocket          = /var/run/mysqld/mysqld.sockport            = 3306basedir         = /usrdatadir         = /var/lib/mysqltmpdir          = /tmplc-messages-dir = /usr/share/mysqlskip-external-lockinglower_case_table_names=1character-set-server=utf8sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION## Instead of skip-networking the default is now to listen only on# localhost which is more compatible and is not less secure.#bind-address           = 127.0.0.1## * Fine Tuning#key_buffer_size         = 16Mmax_allowed_packet      = 16Mthread_stack            = 192K