How do I disable ONLY_FULL_GROUP_BY in MySQL?
To disable ONLY_FULL_GROUP_BY in MySQL, you will need to remove ONLY_FULL_GROUP_BY from the sql-mode setting by using the MySQL configuration file /etc/my.cnf. This file can only be modified via SSH as the root user or WHM >> Terminal. ONLY_FULL_GROUP_BY can not be disabled for a single account or database.
You may follow these steps to disable ONLY_FULL_GROUP_BY:
1. Log into your server via SSH as the root user or navigate to WHM >> Terminal.
2. Run the following command to determine which sql_mode options are enabled and copy the output:
mysql -sse "SELECT @@GLOBAL.sql_mode;"
Example output (Do not copy the output shown below as it may contain options that are incompatible with your version of MySQL):
3. Open the /etc/my.cnf file using any command-line text editor you prefer (ex: vi, vim, nano, or other).
Examples: (Also see: How to edit a file on command-line)
4. Add sql-mode= to the bottom of the [mysqld] section, followed by the output you copied in step 2, and remove ONLY_FULL_GROUP_BY.
Example (Do not copy the sql-mode line shown below as it may contain options that are incompatible with your version of MySQL):
5. Save and close the file.
6. Restart MySQL to load the change by running the following script:
7. Run the following command to confirm ONLY_FULL_GROUP_BY was removed from the enabled sql_mode options:
mysql -sse "SELECT @@GLOBAL.sql_mode;
You may also find our article on How to change the SQL mode in MySQL or MariaDB helpful for more information.