Procedure division statements for the indexed files, COBOL Programming

Assignment Help:

PROCEDURE DIVISION statements for the indexed files:

All the statements which are available for a relative file are also available for an indexed file.

READ STTATEMENT :

When either the RANDOM or DYNAMIC access mode is specified or the records are to be read in a random manner, the syntax is as shown below:

READ  file-name RECORD  [  INTO  IDENTIFIER  ]

           [  ; KEY   IS data-name ]

           [  ; INVALID  KEY  imperative-statement  ]

The data name in the KEY IS phrase should be either the prime key or the alternative key item. If the phrase is not specified, then the prime key is supposed. Let consider PERSONNEL be an indexed file and let EMP-NO be the prime key and NAME be the alternative key. 

 


Related Discussions:- Procedure division statements for the indexed files

Evaluate statemant, single program how may when statement has used

single program how may when statement has used

Sequential file creation and rewriting, SEQUENTIAL FILE CREATION AND REWRIT...

SEQUENTIAL FILE CREATION AND REWRITING: We have to write a program to create a student file with just two fields: sno i.e. Student Number and same i.e. Student Name. Add a few

Concept of a two-dimensional table, Concept of a two-dimensional table: ...

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

Occurs, what does it used

what does it used

The LENDER Bank, The LENDER Bank offers mortgages on homes valued up to $50...

The LENDER Bank offers mortgages on homes valued up to $500,000. The required down payment is calculated as follows: 4% of the first $60,000 borrowed 8% of the next $30,000 borro

Program to demonstrate sort verb, PROGRAM TO DEMONSTRATE SORT VERB: Th...

PROGRAM TO DEMONSTRATE SORT VERB: The file for which a record having 2 fields, viz., Account Number and Name is already available. Sort the file based on the ascending order o

File-control - input-output section, FILE-CONTROL: The FILE-CONTROL pa...

FILE-CONTROL: The FILE-CONTROL paragraph names each and every file and identifies the first medium through file control entries. The basic format of a file control entry is gi

Buffers - file characteristics, Buffers: The Modern computers are able...

Buffers: The Modern computers are able of handling I-O operations independent of the CPU by means of the hardware termed as data channel. For illustration, if two buffers a

Condition - cobol programming, CONDITION - COBOL Programming: The cond...

CONDITION - COBOL Programming: The condition is an entity which at one point of time can have only one of the two values - true or false. As we already know that, the IF verb

Rules of redefines clause, RULES OF REDEFINES CLAUSE The rules shown be...

RULES OF REDEFINES CLAUSE The rules shown below govern the use of the REDEFINES clause: (i) The level-number of data-name-1 and data-name-2 should be identical. (ii) Exce

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