You can use the copy function to move data between device files, between database files (including distributed DB2 Multisystem files), or between device and database files. Unlike traditional copy utilities, the AS/400 copy function is field-level sensitive. Therefore, if you use the copy function, you can rearrange, enlarge, or drop any of the fields. The system also provides a way to define database files. Specific copy commands simplify dealing with tape and diskette units, database source files, and open query files.