columns in GROUP BY clause； this is incompatible with sql_mode=only_full_group_by 版本mysql8.0

朴灿烈づ我的快乐病毒、 2022-09-11 11:14 186阅读 0赞

问题如下：  
ERROR 1055 (42000): Expression \#2 of SELECT list is not in GROUP BY clause and contains nonaggregated column ‘jol.solution.nick’ which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql\_mode=only\_full\_group\_by

原因：  
        mysql5.7以上默认开启了only\_full\_group\_by选项。我的版本是mysql8.0以上的  
1  
Windows解决办法：  
先查询查看sql\_mode中的内容

select @@GLOBAL.sql\_mode;  
\+-----------------------------------------------------------------------------------------------------------------------+  
| @@GLOBAL.sql\_mode                                                                                                     |  
\+-----------------------------------------------------------------------------------------------------------------------+  
| ONLY\_FULL\_GROUP\_BY,STRICT\_TRANS\_TABLES,NO\_ZERO\_IN\_DATE,NO\_ZERO\_DATE,ERROR\_FOR\_DIVISION\_BY\_ZERO,NO\_ENGINE\_SUBSTITUTION |  
\+-----------------------------------------------------------------------------------------------------------------------+  
  
解决办法有两种，第一种是临时解决，不治本，数据库重启还会重新出现此问题，第二种是修改my.ini配置文件，治本，也方便  
办法1：  
将查询到的sql\_mode中ONLY\_FULL\_GROUP\_BY删去即可,重启就会失效

set @@GLOBAL.sql\_mode='STRICT\_TRANS\_TABLES,NO\_ZERO\_IN\_DATE,NO\_ZERO\_DATE,ERROR\_FOR\_DIVISION\_BY\_ZERO,NO\_ENGINE\_SUBSTITUTION';  
1  
办法2：  
先找到自己mysql安装路径

select @@basedir;  
\+-----------+  
| @@basedir |  
\+-----------+  
| E:\\mysql\\ |  
\+-----------+  
  
然后进入文件夹找到自己的my.ini配置文件，修改\[mysqld\]中的内容，添加下面的内容就可以

一定要加在\[mysqld\]里面，就是下面这行代码，就是将查询到的sql\_mode中ONLY\_FULL\_GROUP\_BY删去

sql\_mode=STRICT\_TRANS\_TABLES,NO\_ZERO\_IN\_DATE,NO\_ZERO\_DATE,ERROR\_FOR\_DIVISION\_BY\_ZERO,NO\_ENGINE\_SUBSTITUTION  
1  
然后退出数据库，在服务里面重启MySQL就可以

Ubuntu系统/Linux系统解决办法  
我的数据库配置文件存在 /etc/mysql/mysql.conf.d/mysqld.cnf 里，所以直接打开这个文件

vim /etc/mysql/mysql.conf.d/mysqld.cnf  
1  
打开文件后键入

i \#插入命令  
1  
会进入这个配置文件

可能会出现这个情况鼠标滚轮下滑没用，使用键盘按键⬇下拉就行

跟windows一样，添加sql\_mode，也是删除ONLY\_FULL\_GROUP\_BY后的那一串东西，加进入后键入键盘左上角的Esc，就会退出插入模式，然后再键入 :wq 后回车就可以保存文件，然后再重启MySQL就可以  
重启命令：

sudo service mysql restart  
1  
然后进入MySQL输入下面的代码查看，即可

select @@GLOBAL.sql\_mode;  
1

columns in GROUP BY clause； this is incompatible with sql_mode=only_full_group_by 版本mysql8.0

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