Disable foreign key checks during import

The command

SET FOREIGN_KEY_CHECKS=0;

sets the value of a variable in a session scope. So it affects on the current session only, and do not affect on another sessions, both already running and those that will be launched later.

If you specify new value as a global-scope one using the command

SET GLOBAL FOREIGN_KEY_CHECKS=0;

then the global setting will be set. It affects on the current session and sessions that will be launched later, and do not affects on another sessions, which are already running.