The data file utility (DFU), which is part of the iSeries™ Applications Development Tools package available from IBM®, is a program builder that helps you create programs to enter data, update tables, and make inquiries.
You do not need a programming language to use DFU. Your data entry, maintenance, or inquiry program is created when you respond to a series of displays. An advantage in using DFU is that its generic nature allows you to create a database update program to load data to a table faster than you could by using programming languages such as SQL. You can work with data on a remote server using DFU with DDM files, or by using display station pass-through to run DFU at the application server (AS).