newbie question

hello.

i have a text file which i insert into a table using "load data infile
replace" every couple of minutes.
the content of the text file changes.
i want to be able to delete all rows in the table that are not in the
text file.

i cant delete the table and load data because its being accessed
constantly.

is there a way to just delete the records in the table that are not in
the file.

thanks in advance