Illustration of indexed tables, COBOL Programming

Assignment Help:

Illustration of indexed tables:

Index items defined through the INDEXED phrase of the OCCURS clause are one type of indexes. There can be other type of index items that are defined like data names in the DATA DIVISION with USAGE IS INDEX clause. Note that former we explained only the DISPLAY and COMPUTATIONAL usages. Index is other kind of usage. An index name defined with INDEX usage must not have any picture clause in the entry.

For illustration, the entry

77  I  USAGE  IS  INDEX

defines the index I.

The indexes defined with the usage INDEX are termed as index data items. They are functionally similar to the indexes defined through the INDEXED phrase with the exception that when an index name is defined with the USAGE IS INDEX phrase, the similar index name can be used for subscripts in more than one table or in more than one level of table.

 


Related Discussions:- Illustration of indexed tables

Example of on size error option, ON SIZE ERROR OPTION: Whenever a size...

ON SIZE ERROR OPTION: Whenever a size error occurs, the contents of the result field after the operation is unpredictable.  Though, the processing is not-terminated and the co

Currency sign - edit characters for numeric data, Currency Sign - edit char...

Currency Sign - edit characters for numeric data: $ (Currency Sign): The single currency sign can appear at the leftmost place of a picture. In that situation the $ cha

Renames clause, RENAMES CLAUSE: At times re-grouping of an elementary ...

RENAMES CLAUSE: At times re-grouping of an elementary data items in a record may be essential so that they can belong to the original as well as to the latest group. This is o

Search verb, SEARCH VERB: The SEARCH verb is used to position elements...

SEARCH VERB: The SEARCH verb is used to position elements in one-dimensional tables. Let us consider the following problem. Assume that each element of a table consists of thr

Rules for apply for the condition name, Rules for apply for the condition n...

Rules for apply for the condition name: The rules below apply for the condition name. (i) The Condition names should be explained at level 88. The level number starts in ma

Rewrite statement - relative files, REWRITE STATEMENT: The REWRITE st...

REWRITE STATEMENT: The REWRITE statement has the format for a relative file as shown below, REWRITE record-name  [ FORM identifier ]

Figurative constants - cobol program, Figurative Constants: The Figura...

Figurative Constants: The Figurative constants have several fixed names and the compiler recognizes these names and it sets up the equivalent values in the object program.

Program for output file that can be our vsam file, We have input file, reco...

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 f

Program, calculate simple interest

calculate simple interest

Group item as operand in the relational condition, Group Item as Operand in...

Group Item as Operand in the Relational Condition: Whenever an operand of a relational condition is the group item, the item is then considered to be an alphanumeric field. Th

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd