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Example of Redefines clause:
This illustration describes a sales record that may either contain the total amount of sale or the quantity (QTY) and UNIT-PRICE. The aim of such description may be to have two types of records and their types may be determined from the data item named SALES-TYPE. Based on some predetermined values of SALES-TYPE the record will be interpreted in one of the two forms, Note that the SALES-BY-UNIT and TOTAL-SALES refer to the similar storage space. They actually represent two different mappings of the similar storage region.
The REDEFINES clause as explained above is quite common in use. Though, the clause may be simply used for the aim of conservation of storage space possibly in the working-storage section. In such situations two records having no meaningful connection between them can also be used to share similar storage space provided both of them are not used in the program concurrently. The syntax of the REDEFINES clause is as shown below:
Level-number daa-name-1 REDEFINES data-name-2
Evaluate is like a case statement & Evaluate stamenet can be used to replace nested Ifs. The difference b/w EVALUATE and case is that there is no 'break' is required for EVALUATE
we have input file ,record layout is EMP ID (6 char) , EMP NAME (20 char), Designation (3 char),Salary (5 digit) Base Branch (10char) Grade (3 Alphanumeric). This is the input file
program
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
CONDITIONS-NAME CONDITION: The condition name is an entity which itself is a condition and these can have either a true or false value. Though, a condition name cannot be d
Example of Sign condition: The illustration below describes the use of the sign condition. Illustration: 77 BALANCE PIC S9 (6) V99. . . I
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
FD Entry for variable-length Records: The RECORDS CONTAINS and BLOCK CONTAINS clause are quite dissimilar in the case of files with variable- length records. The syntax of the
START STATEMENT: The START statement places the files to the initial logical record whose record key satisfies the condition specified by the KEY phrase. The access mode shoul
What is the difference between subscript and index
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