columns in GROUP BY clause； this is incompatible with sql_ mode=only_ full_ group_ By mysql8.0 solution

Questions as follows ：

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

reason ：

		mysql5.7 The above is enabled by default only_full_group_by Options . My version is mysql8.0 The above 

Windows terms of settlement ：

Query and view first sql_mode The content in

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 |
+-----------------------------------------------------------------------------------------------------------------------+

There are two solutions , The first is temporary solution , No cure , This problem will reappear when the database is restarted , The second is to modify my.ini The configuration file , Permanent cure , It's also convenient
Way 1：
Will find out sql_mode in ONLY_FULL_GROUP_BY Just delete it , Restart will fail

set @@GLOBAL.sql_mode='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION';

Way 2：
Find yourself first mysql The installation path

select @@basedir;
+-----------+
| @@basedir |
+-----------+
| E:\mysql\ |
+-----------+

Then go into the folder and find your own my.ini The configuration file , modify [mysqld] The content in , Add the following content


Be sure to add it to [mysqld] Inside , It's the following line of code , Is what will be found sql_mode in ONLY_FULL_GROUP_BY delete

sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION

Then exit the database , Restart in the service MySQL Can

Ubuntu System /Linux System solutions

My database configuration file exists /etc/mysql/mysql.conf.d/mysqld.cnf in , So open this file directly

vim /etc/mysql/mysql.conf.d/mysqld.cnf

Type after opening the file

 i # Insert command 

Will enter this configuration file

This may happen. It's useless to slide the mouse wheel , Use the keyboard keys to pull down

Follow windows equally , add to sql_mode, Also delete ONLY_FULL_GROUP_BY The last string of things , After entering, type Esc, Will exit the insert mode , Then type :wq Press enter to save the file , Then restart MySQL Can
Restart command ：

sudo service mysql restart

Then enter MySQL Enter the following code to view , that will do

select @@GLOBAL.sql_mode;