Using VSAM Files
Reading VSAM Data in a COBOL Program
VSAM basics; VSAM KSDS, ESDS and RRDS data sets; using Access Method Services (AMS) to define, delete, load and print VSAM files.
Identifying the file as VSAM; OPEN and CLOSE of VSAM data sets; file status and retrn codes; reading VSAM data sequentially, randomly and dynamically.
Modifying VSAM Data in a COBOL Program
WRITE using sequential access; WRITE using index access; the DELETE statement; the REWRITE statement; handling invalid keys.
Using Alternate Indexes
Alternate indexes and paths; defining alternate indexes and paths; identifying the alternate index in COBOL; processing VSAM data using the alternate index.
Extensive hands-on exercises throughout the course reinforce the material covered.