Combining segments

Combining segment types to maximize use of space is the second type of change you might need to make in the structure of your database record.

For example, having two segment types, a dependent segment for college classes with a dependent segment for instructors who teach the classes, is an inefficient use of space if typically only one or two instructors teach a class. Rather than having a separate instructor segment, you can combine the two segment types, thereby saving space.

Combining segments also requires that you write an unload and reload program. (The reorganization utilities cannot be used to make such a change.)