Defining a Join in a Master File


Describe a new relationship between any two segments that have at least one field in common by joining them. The underlying data structures remain physically separate, but are treated as if they were part of a single structure from which you can report. This section describes how to define a join in a Master File for FOCUS, fixed-format sequential, and VSAM data sources. For information about whether you can define a join in a Master File to be used with other types of data sources, see the appropriate data adapter manual.