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

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我的情况：

Mysql 5.7.21 版本运行sql 报错如题，同样的 sql 直接本地运行不报错。

但是当连接的是服务器上的 Mysql 时出现这个报错（即使是运行一个最简单的 select * from 表）。

以下解决方法转自：https://blog.csdn.net/u014520745/article/details/76056170

在用mysql执行如下查询的时候：

select * from `sys_user_group` group by `GROUP_ID`

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

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;

里面默认设置了

sql_mode=only_full_group_by

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

到此mysql配置文件的完整配置如下：

[mysqld_safe]
socket          = /var/run/mysqld/mysqld.sock
nice            = 0[mysqld]
#
# * Basic Settings
#
user            = mysql
pid-file        = /var/run/mysqld/mysqld.pid
socket          = /var/run/mysqld/mysqld.sock
port            = 3306
basedir         = /usr
datadir         = /var/lib/mysql
tmpdir          = /tmp
lc-messages-dir = /usr/share/mysql
skip-external-locking
lower_case_table_names=1
character-set-server=utf8
sql_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         = 16M
max_allowed_packet      = 16M
thread_stack            = 192K

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

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