I have typed:
DELIMITER DELIMITER
Just trying to figure it out how to set my delimiter to normal ';' again;
Once you set a different delimiter all the query statement will expect that delimiter to be used
delimiter delimiter
select * from users ; // This would do nothing
But
select * from users delimiter
will list the users since once it encounters delimiter
which is your defined delimiter the statement will be executed.
To go back you need to use
delimiter ;