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REWRITE STATEMENT:
As in the situation of a relative file, the REWRITE statement needs that the file should be opened in the I-O mode, and if the SEQENTIAL access mode is specific, the value of the record key of the record being replaced should be equal to that of the record last from this file.
The INVALID KEY condition occurs in the cases as shown below:
(i) Whenever the record key does not match that of an existing record in the file.
(ii) For the SEQUENTIAL access, whenever the value of the record key is not similar to that of the last record read from the file.
Data types available in COBOL are given below Alpha-numeric (X), numeric (9), alphabetic (A)
VALUE CLAUSE: The value clause defines the preliminary value of the data item. Normally initialization will be completed just before the first statement in the procedure di
Rules for Simple sort verb: The work file is to be defined by a sort elaboration entry (SD entry).The format of SD entry is as shown below. The rules below should be taken
PICTURE specification: The size of a group item is equivalent to the total of the sizes of all the subordinate elementary items. The group item class is alphanumeric. The i
ARITHMETIC VERBS: Most of the problems need some computations to be performed on the input or intermediate data that are numeric in nature. The Arithmetic verbs are used to pe
Picture Clause: The picture clause explains the general characteristics of an elementary data item. These characteristics are elaborated below: Class: In COBOL the
Comparison of Nonnumeric Operands: A nonnumeric operand can be compared to the other nonnumeric operand according to the rules as shown below: (i) Fields of Equal Sizes:
bal majduri ik kanuni apradh hai is de bavjud bache ,ghra,hotla,road, kam karn lai majbur han bacheya te mapeya nu parhai val prerit karn lai ik bashan teyar kro
Example of Write statement: Illustration: (i) WRITE TRANS-RECORD AFTER ADVANCING 3 LINES. This WRITE statement specified that the TRANS-RECORD is a record name of a fi
REWRITE STATEMENT: The REWRITE statement has the format for a relative file as shown below, REWRITE record-name [ FORM identifier ]
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