MySQL query appears in aggregated query with group by

1. Question:

Error querying database.  Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: 
In aggregated query without GROUP BY,expression #2 of SELECT list contains nonaggregated column 'pay.t.type'; this is incompatible with sql_mode=only_full_group_by

2. Reasons:
After mysql5.7.5, the only_full_group_by was opened by default, so some of the previous SQLs could not be executed normally. In fact, it was caused by our SQL irregularity. Because some of the data returned after Group By were uncertain, so it was only then possible. This error appears.

3. Solution, two types:
Option 1: Modify SQL, because this problem occurs, it is basically caused by this problem.

ANY_VALUE(column_name)
Example:
SELECT id,name,ANY_VALUE(age) FROM table1 GROUP BY name;

Option 2: Turn off only_full_group_by, mine is the Linux environment, I will talk about Linux's solution step:
① Log in to mysql, linux login: MySQL -u Username -P, and then enter the password, enter SQL: show variables like ‘%sql_mode’;
②, edit my.cnf file, the file address is generally: /etc/my.cnf ,/etc/mysql/my.cnf, find the position of the sql-mode, remove the only_full_group_by, and then restart mysql; some my.cnf does not have no in my.cnf. SQL-MODE needs to be added, pay attention to adding to [MySQLD].

[mysqld]
sql-mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION

I just joined elsewhere, and I did not take effect after restarting. The specific figure below is as follows:

③ After the modification is successful, restart the MySQL service, Service MySQL RESTART, restart it, and then log in to MySQL, enter SQL: Show Variables like ‘%SQL_Mode’; if you do n’t have_full_group_by, it means that it has been successful.

Original address

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