Here the example for insert file contents into blob field

http://www.volny.cz/iprenosil/interbase/fsql-examples.htm

/* Inserting contents of file(s) into blob/varchar fields. */

INSERT INTO tab(id, pict, thumb) VALUES (1, @'c:\pict.jpg',
@'c:\smallpict.jpg

The question is: - using Fsql, how we can extract data from blob field and
create a file on Win Xp ntfs?

Thank in advance

RobertoA