Murach's Structured COBOL
Chapter 16 How to use the sort/merge feature
Concepts for sorting and merging 514
Sorting concepts 514
Merging concepts 516
Why COBOL sorts and merges improve efficiency 518
COBOL for sorting 520
How to code Select and SD statements 520
How to code the Sort statement 522
How to code the Release statement 524
How to code the Return statement 524
An edit-sort-and-update program 526
The program specifications 526
The structure chart 528
The COBOL code 530
Efficiency considerations 532
COBOL for merging 536
How to code the Merge statement 536
How to use the Sort statement to merge files 538
Special considerations for IBM mainframe programs 540
How to merge files using JCL 540
The FASTSRT compiler option 540
IBM special registers 540
Perspective 542
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