#h      first   last    first_last
John    Heidemann       John_Heidemann
Greg    Johnson Greg_Johnson
Root            Root_
# this is a simple database
#  | /home/johnh/BIN/DB/dbcol fullname
#  | dbcolrename fullname first_last
#  | /home/johnh/BIN/DB/dbcolsplit -C _ first_last
#  | /home/johnh/BIN/DB/dbcol first last
#  | dbcolmerge -C _ first last