In cobol, instead of having to write special code every time we want to merge files, we can use the merge verb. Input file records are transferred to the work file for the sorting process. Program to merge 2 files with students records cobol. Simple text files cannot be used in cobol, instead ps physical sequential and vsam files are used. If your files have a 1to1 or a 1tomany relationship, the model should work for you. Cobol internal sort sorting of data in a file or merging of two or more files is a common necessity in almost all businessoriented applications. Recording mode is v this means that the logical record of the file is of a variable length. Depending on your exact requirement, changes may need to be made, but the overall process works for most cases.
The merge verb takes two or more identically sequenced files and combines them, according to the key values specified. Input file is the file which we have to sort either in ascending or descending order. Recording mode is f this means that the logical record of the file is of a fixed length, hence all the records in the file will occupy a fixed length which is provided in a cobol program or in jcl. While learning the basics of file in cobol, the concepts of both languages should not be corelated. File handling in cobol file handling in cobol file. If open is successful, then only further operations are possible on a file. File handling verbs are used to perform various operations on files. Select biofile assign to disk organization is line sequential. Cobol code must be converted into machine code using a compiler. Code for program to merge 2 files with students records in cobol identification division.
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