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18/11/2020

How do I sort files in JCL?

How do I sort files in JCL?

JCL – Basic Sort Tricks

  1. A file has 100 records. The first 10 records need to be written to output file.
  2. Input file has one or more records for same employee number. Write unique records to output.
  3. Overwrite input record content.

How do I sort a file in mainframe?

DFSORT TUTORIAL REFERENCE STUDY MATERIAL – SORT JCL – IBM MAINFRAME. EXPLANATION 1. SORT FIELDS=(1,3,CH,A) Input file will be sorted depending up on the key specified above 1,3,CH,A – key starting position is 1 and length 3, comparing type character, sorting is don in ascending order 2.

How does sort work in mainframe?

The Sort/Merge utility is a mainframe program to sort records in a file into a specified order, merge pre-sorted files into a sorted file, or copy selected records. Internally, these utilities use one or more of the standard sorting algorithms, often with proprietary fine-tuned code.

How do you sort in descending order in JCL?

JCL to reverse the file records Below id the JOB to do that. Explanation: INREC OVERLAY statement adds a sequence in 40th position. SORT FILEDS statement sorts the records in descending order based on the newly added sequence number.

How do I format fields in sort?

REFORMAT FIELDS=(F1:1, 71, F2:1, 9) – REFORMAT fields tells the sort utility, what fields to be written into output file from the input files by specifying starting and ending position.

What is ZD in sort JCL?

In most of the scenarios, your input file has data either in Packed decimal (COMP-3) format which is not in readable format. To change this to readable format, you need to convert these numbers into ZONED Decimal (ZD) format. This can be accomplished using SORT.

What is sorting in mainframe?

JCL – SORT SORT Fields A SORT statement can also be used to specify a copy records. If multiple positions of sorting specified, the order of priority is from left to right. The sorting orders can be either Ascending or descending. Example 1: SORT a record in input file by one field.

How does Cobol SORT work?

SORT verb is used to sort a file. Three files are used in the Sort process in COBOL: Input file is the file which we have to sort either in ascending or descending order. Work file is used to hold records while the sort process is in progress. Input file records are transferred to the work file for the sorting process.

What is ZD in JCL?

In most of the scenarios, your input file has data either in Packed decimal (COMP-3) format or Binary (COMP) format which is not in readable format. To change this to readable format, you need to convert these numbers into ZONED Decimal (ZD) format. This can be accomplished using SORT.

What do you need to know about sort in JCL?

Every JCL programmer must know an important process which is – SORT in JCL. So, what exactly is SORT? Suppose, you have an input file and you want to format the data in multiple ways. For Example – Sort a particular field or position in ascending or descending order. Removing the duplicate records from the file.

How to remove duplicate records from a JCL file?

SORT in JCL 1 Sort a particular field or position in ascending or descending order. 2 Removing the duplicate records from the file. 3 To find a bad record from the list of records. 4 Copy the input file by including or excluding a few/some records. 5 Merging the fields from the input. More

Is there a way to sort files in relative order?

We can sort records with only one field. For RRDS and BDAM files the SORT command sorts records in relative record number (RRN or RBA) order. We cannot sort a keyed file on a field other than the key field. The default parameter for SORT is KEYS for a keyed file. Thus the commands SORT and SORT KEYS are the same.

Which is an example of a sort statement?

A SORT statement can also be used to specify a copy records. If multiple positions of sorting specified, the order of priority is from left to right. The sorting orders can be either Ascending or descending. Format of the field like CH, PD, BI, ZD etc,. Example 1: SORT a record in input file by one field.