Answer / nnn

First sort the both files through JCL or internal sort.
Then follow below logic in the program.

Read file1
Read file2

perform until end-of file1 OR end-of file2
if file1 = file2
write a matched record to output
read file1
read file2
end-if
if file1 < file2
read file1
end-if
if file1 > file2
read file2
end-if
End-perform.

Answer / soumya santosini patnaik

first load the files in shorted order after that code a
matching program. in the procedure division check the file1
entry with file2 entry if file1 entry = file2 entry then
then write to o/p file end-evaluate esle check for file1<
file2 (if yes then the pointer is brought down to the 2nd
rec of file1 and checked with 1st rec of file2 when the
para is performed for 2nd time),if the above condition is
false then it checks if file1>file2 if yes then pointer is
brought down to the next entry of file2 and checked with
1st entry of file1 with 2nd entry of file2 in next perform
and the process is done till the end of records.

Answer / siri

IN COBOL
IF FILE1>FILE2
READ FILE2
IF FILE1<FILE2
READ FILE1
IF FILE1=FILE2
WRITE FILE3
READ FILE1
READ FILE2.......
IN JCL
//XSUM DD DSN=XSUM.MATCH
//SYSIN DD *
SORT FIELDS=COPY
SUM FIELDS=NONE,XSUM
/*

Answer / sreejith

firt read file1 move each record to table. at the end of
file1 start read file2. for each record read from file2
compare that record with all the elements from table. if it
match write that record to the output file. same procedure
follow for all the records from file2

Answer / kalone

First load both the files into 2 arrays and then sort them
on say ASC criteria and then take the first element from 1
file and compare with the element of other file , if
matches write into Outfile ,like wise we can keep on
reading & comparing till we get all the matching values in
the outfile.

Answer / bala

FILE SECTION.
FD OLD-MASTER
LABEL RECORDS ARE STANDARD.
01 OLD-MASTER-REC.
05 M-ACCT-NO PIC X(5).
05 AMOUNT-DUE PIC 9(4)V99.
05 PIC X(89).
FD TRANS-FILE
LABEL RECORDS ARE STANDARD.
01 TRANS-REC.
05 T-ACCT-NO PIC X(5).
05 AMT-TRANS-IN-CURRENT-PER PIC 9(4)V99.
05 PIC X(89).
FD NEW-MASTER
LABEL RECORDS ARE STANDARD.
01 NEW-MASTER-REC.
05 ACCT-NO-OUT PIC X(5).
05 AMOUNT-DUE-OUT PIC 9(4)V99.
05 PIC X(89).
WORKING-STORAGE SECTION.
PROCEDURE DIVISION.
100-MAIN-MODULE.
PERFORM 800-INITIALIZATION-RTN.
PERFORM 600-READ-MASTER.
PERFORM 700-READ-TRANS.
PERFORM 200-COMP-RTN
UNTIL M-ACCT-NO = HIGH-VALUES
AND
T-ACCT-NO = HIGH-VALUES
PERFORM 900-END-OF-JOB-RTN.
STOP RUN.
200-COMP-RTN.
EVALUATE TRUE
WHEN T-ACCT-NO = M-ACCT-NO
PERFORM 300-REGULAR-UPDATE
WHEN T-ACCT-NO < M-ACCT-NO
PERFORM 400-NEW-ACCOUNT
WHEN OTHER
PERFORM 500-NO-UPDATE
END-EVALUATE.
300-REGULAR-UPDATE.
MOVE OLD-MASTER-REC TO NEW-MASTER-REC
COMPUTE AMOUNT-DUE-OUT = AMT-TRANS-IN-CURRENT-PER
+ AMOUNT-DUE
WRITE NEW-MASTER-REC
PERFORM 600-READ-MASTER
PERFORM 700-READ-TRANS.
400-NEW-ACCOUNT.
MOVE SPACES TO NEW-MASTER-REC.
MOVE T-ACCT-NO TO ACCT-NO-OUT.
MOVE AMT-TRANS-IN-CURRENT-PER TO AMOUNT-DUE-OUT.
WRITE NEW-MASTER-REC.
PERFORM 700-READ-TRANS.
500-NO-UPDATE.
WRITE NEW-MASTER-REC FROM OLD-MASTER-REC.
PERFORM 600-READ-MASTER.
600-READ-MASTER.
READ OLD-MASTER
AT END
MOVE HIGH-VALUES TO M-ACCT-NO
END-READ.
700-READ-TRANS.
READ TRANS-FILE
AT END
MOVE HIGH-VALUES TO T-ACCT-NO
END-READ.
800-INITIALIZATION-RTN.
OPEN INPUT OLD-MASTER
TRANS-FILE.
OPEN OUTPUT NEW-MASTER.
900-END-OF-JOB-RTN.
CLOSE OLD-MASTER
TRANS-FILE
NEW-MASTER.

Hope this is useful.

Answer / ajay kumar ande

OPEN INPUT FILE1
OPEN INPUT FILE2
OPEN OUTPUT FILE3

MOVE 'N' TO EOF
PERFORM UNTIL EOF='S'
READ FILE1 AT END MOVE 'S' TO EOF
READ FILE2 AT END MOVE 'S' TO EOF

IF EMPNO1 = EMPNO2
MOVE
REC2 TO REC3
WRITE REC3
END-PERFORM.

CLOSE FILE1, FILE2, FILE3.

Answer / richa

from these evaluate i am able to get the matched records in
one file but if i want to write the unmatched record in the
spool area then how to track those unmatched records from
here

Answer / michar de papachuil

This might help you here but you have to Sort the two files
first before doing the match.

IF File1 = File2
PERFORM 2400-MATCH-BOTH-FILES THRU 2400-EXIT
PERFORM 2100-READ-FILE1 THRU 2100-EXIT
PERFORM 2200-READ-FILE2 THRU 2200-EXIT

ELSE

IF I-GROUP-SUBSYSTEM LESS THAN I-MODULE-SUBSYSTEM
PERFORM 2600-UNKNOWN-FILE1-VALUES THRU 2600-EXIT
PERFORM 2100-READ-FILE1 THRU 2100-EXIT
ELSE
PERFORM 2500-UNKNOWN-FILE2-VALUES THRU 2500-EXIT
PERFORM 2200-READ-FILE2 THRU 2200-EXIT
END-IF

Answer / anil t.

Using Merge

2 input fles: 2 flat files, with different number of records. both are having unique key for each record and already sorted in ascending order . match these files using unique key and in output only matching key value has to be written. please procide cobol logic

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