Hello there!

I dont seem to get a loop to work with this code, it simple refuse.
Any kind of help would be very much appreciated, got deadline today.

I need to cut out first 3 letters and letter 4-6 from each line and get it to become a variable.
So i can add the letters to the db.
So for each line in db add $a, $b.
I can write it like this, cut is not good but always something.
a= cut -c1-3 file
b =cut -c4-6 file
And then some kind of loop with this as command:
db2 "update PTS.OCC_LINK set OL_Link_COST = '$c' where OL_ID = $b"