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REWRITE statement:
The REWRITE statement is used to update the existing record in a disk file.
The normal format is as shown below:
REWRIE record-name [ FROM identifier ]
It may be keep in mind that the syntax is similar to that in the situation of a WRITE statement and the FROM option has similar meaning.
INDEXED TABLES: The OCCURS clause that is used to define tables can optionally have an INDEXED phrase. This phrase involves the names of data items which are to be used as sub
GIVING file-name-5. The input files to be merged through the MERGE statements which are specified in the USING phrase. These files should be sequential files and should be
77 level used for- It is Elementary level item. it Cannot be subdivisions of other items or cannot be qualified, or they can be subdivided themselves.
DIVIDE VERB: The aim of the DIVIDE verb is to divide one number by the other and to store the result. There are few forms of this verb. One of its forms is as shown below:
Example of read statement: Illustration: READ OLD-MASTER AT END MOVE ZERO TO END-OF-RECORDS. As a result of this statement, generally the next record from the OLD-MAST
Concept of a two-dimensional table: Concept of a two-dimensional table can be easily extended to tables having three or more dimensions. The Handling of tables up to three dim
Edit Characters for Numeric Data: The characters below can be used in the PICTURE clause to indicate the editing. Z * $ - + CR DB . , B O /
Record Description for the Variable-length Records: When the variable- length records consists of records of various lengths, each record type is to be explained at level 01 f
SEQUENTIAL FILES WITH THE VARIABLE-LENGTH RECORDS: The Magnetic - tape or disk files can hold variable-length records. In this situation the file can have records with various
Common form of the READ statements: Format 1 is the common form of the READ statements. Format 2 is used when the access mode is either random or dynamic. For illustration,
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