What is Joinkeys?
In RDBMS, SQL JOIN clause is used to join tables and perform multiple operations on it. To perform operations on records in different flat files, JOINKEYS are used. With the help of JOINKEYS in SORT JCL, various join operation on matched and non-matched records can be executed based on matching fields or Keys.
What is reformat fields in Joinkeys?
A REFORMAT statement can always be used for a JOINKEYS application, and is required unless a JOIN statement with the ONLY operand is specified. The REFORMAT statement indicates the fields from the F1 file and/or the F2 file you want to include in the joined records, and the order in which you want the fields to appear.
What is join unpaired?
JOIN UNPAIRED,F1,ONLY is used to restrict the output (SORTOUT) to the records in F1 that do not have matching keys in F2. UNPAIRED,F1,F2 to keep the unpaired joined records as well as the paired join records.
How do I sort a file in JCL?
JCL – Basic Sort Tricks
- A file has 100 records. The first 10 records need to be written to output file.
- Input file has one or more records for same employee number. Write unique records to output.
- Overwrite input record content.
How do I use Joinkeys?
JOINKEYS statements. Two JOINKEYS statements are required for a JOINKEYS application; one for the F1 file and the other for the F2 file: FILE=F1 or F1=ddname must be used to indicate that the JOINKEYS statement applies to the F1 input file. FILE=F1 associates the F1 file with a ddname of SORTJNF1.
How do you write a matching record in Cobol?
ws-acct-match pic x. 1)SORT SORT-FILE1 ASCENDING SORT-KEY(empnumber) USING INPUT1-FILE GIVING INP1-FILE. 2)SORT SORT-FILE2 ASCENDING SORT-KEY(empnumber) USING INPUT1-FILE GIVING INP2-FILE. PERFORM 250-COMP-PARA UNTIL EOF-IE = ‘Y’ OR EOF-FILE1 = ‘Y’.
How do I compare two mainframe files?
Follow these steps:
- Open the Browse Dataset screen, Option 1 from the main menu.
- Identify the data set and member that contains your compare JCL.
- Press Enter. The compare JCL you have stored in the member displays.
- Type sub to submit your job for batch processing. A message confirming your submission displays.
What is restart logic in COBOL DB2 program?
The restart logic can be implemented in a COBOL-DB2 program by fixing a commit frequency. If we choose a commit frequency of 100, then the following steps need to be performed: Declare a variable for a counter, say WS-COUNT. Place a loop in which we will read the record from the file and insert it in a database.
What is S322 Abend in JCL?
On a mainframe, a job abends with an S322 abend code when the TIME value has been exceeded on a per job or per step basis.
What is Superc in mainframe?
The SuperC utility (option 3.12) is a dialog that uses the SuperC program to compare data sets of unlimited size and record length at the file, line, word, or byte level. The panel shown in Figure 1 is used to specify the name of a new data set.
When to use joinkeys statement for F1 file?
When FILE=F1, FILES=F1 or F1=ddname is specified, the other operands of the JOINKEYS statement apply to the F1 file. Must be used for the JOINKEYS statement associated with the F2 file.
What are the requirements for each joinkeys statement?
Each JOINKEYS statement must specify the DDNAME of the file it applies to and the starting position, length, and sequence of the keys in that file. You can also optionally specify If the file is already sorted by the keys and if sequence checking of the keys is not needed. If the file has fixed-length or variable-length records.
What is the Order of the joinkeys file?
JOINKEYS FILE=F1,FIELDS= (22,3,A),SORTED JOINKEYS FILE=F2,FIELDS= (15,3,A) File F1 is copied using the DDNAME SORTJNF1 and the ascending key in positions 22-24. The SORTJNF1 records will be checked for the correct key order. File F2 is sorted using the DDNAME SORTJNF2 and the ascending key in positions 15-17.
How to join two files based on a key?
JCL, JOIN, mainframe, paired, reformat, SORT, unpaired. SORT JOIN – TO JOIN TWO FILES BASED ON A KEY We can make use of SORT to join two files and writes records from both files 1. Both Files Matching Records (Inner Join) Write only records that match on key from both files.