How do you match files in COBOL?

How do you match files in COBOL?

MATCH – MERGE LOGIC Match Merge logic is extensively used in COBOL programs to compare the data in two sequential files effectively. O…

1. File1 File2 FILEA FILEB FILEC.
2. Close all files.
3. Advantages : Open/close both file only once.
4. Faster.

How do I compare two mainframe files?

Follow these steps:

1. Open the Dataset Compare screen from the main menu (Option 3.10).
2. Identify the data sets that you want to compare in the “OLD” Dataset and “NEW” Dataset fields.
3. Set the following options:
4. Enter the layout data set and layout member in the Record Layout for Formatted Print section.

How do you read a file in COBOL sample program?

COBOL File Operations

1. We should open a file before we perform any operation in it.
2. All the files must open in PROCEDURE DIVISION before any other operations are performed in it.
3. OPEN INPUT FILE-NAME.
4. All the input files must be READ in PROCEDURE DIVISION before the records in the file we use further.

How do I merge files in COBOL?

MERGEing files In COBOL, instead of having to write special code every time we want to merge files, we can use the MERGE verb. The MERGE verb takes two or more identically sequenced files and combines them, according to the key values specified. The combined file is then sent to an output file or an OUTPUT PROCEDURE.

How can we compare two files in Cobol?

Comparing COBOL code in the compare editor

1. Click a local . cbl file.
2. Press Ctrl and select another local . cbl file in the same view and the same stream.
3. Right-click and select Compare with > Each other.

How do you inspect in Cobol?

INSPECT Statements

1. INSPECT statement with TALLYING phrase (Key Phrases to use: BEFORE/AFTER, CHARACTERS, ALL, LEADING and FIRST)
2. INSPECT statement with REPLACING phrase (Key Phrases to use: BEFORE/AFTER, CHARACTERS BY, ALL, LEADING and FIRST)
3. INSPECT statement with TALLYING and REPLACING phrases.

What is Superc in mainframe?

SuperC is a fast and versatile compare program that processes two. sequential data sets, two complete partitioned data sets (PDS), members. from two PDSs, or concatenated data sets. You can also compare data. sets of unlimited size and record lengths at the file, line, word, or.

How do I compare two large files in mainframe?

Steps:

1. Type an N in the Sync key specification field.
2. Type a Y in the Files sorted on sync key field.
3. Type an F in the Compare criteria option field.
4. Type ALL in the Records to compare field.
5. Type ALL in the Differences to compare field.
6. Press .

How is match merge logic used in COBOL?

Match Merge logic is extensively used in COBOL programs to compare the data in two sequential files effectively. Only pre-requisite to for using this logic is, all input files to be in Sorted Order Problem : I have 2 Sequential files File1 and File2.

What does format F mean in COBOL program?

Format 1: 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.

How are records stored in a COBOL file?

The records are stored in a sequential manner one after the other. To access the Nth record, we have to read first (N-1) records first. New records are always added at the end of the file. It can have a fix or variable length.

How is the block size determined in COBOL?

If we code this, the block size is determined at runtime. ‘RECORDING MODE’ we use this to describe the format of the logical records of the file. 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.