INSERT INTO file with parameter - help

[three eye]

Hi guys,
I'm a total newbie in mySQL.
All I'm trying to do is to create a stored procedure with an input string and put it in a text file (in a new line).

I got this:
DELIMITER $$

CREATE PROCEDURE export_static()
BEGIN
SELECT * INTO OUTFILE '/tmp/file_name.txt' FROM Table1;
END $$

DELIMITER ;

from https://stackoverflow.com/questions/2333806/how-to-store-output-of-a-stored-procedure-on-to-disk

But how do I input a string and just output it into a file (without having a table)?

Thanks for the help