Solve error 1290 --secure-file-priv MySQL

If you're encountering the following error:

The MySQL server is running with the --secure-file-priv option so it cannot execute this statement

This is generally as a result of exporting results to a directory not deemed secure by MySQL. To solve this you can find out which directories are deemed as secure by executing the following command in the MySQL prompt:

show variables like 'secure_file_priv';

The default directory is:

/var/lib/mysql-files