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

Identification division - cobol programming, Identification Division: ...

Identification Division: The Identification Division is the first division of each and every COBOL source program. The paragraph PROGRAM-ID is necessary in most of the mac

Program for perform - thru, PROGRAM FOR PERFORM - THRU: We have to wri...

PROGRAM FOR PERFORM - THRU: We have to write a program to elaborate PERFORM ...THRU statement Identification division. Program- id.  Perfthru. Environment division.

Illustration of indexed tables, Illustration of indexed tables: Index ...

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 de

Program using occurs clause, PROGRAM USING OCCURS CLAUSE: We have to w...

PROGRAM USING OCCURS CLAUSE: We have to write a simple program to demonstrate Occurs Clause. Get the employee details for 3 persons and compute the total salary. identifica

Program for move corresponding, PROGRAM FOR MOVE CORRESPONDING: We hav...

PROGRAM FOR MOVE CORRESPONDING: We have to write a simple program to demonstrate Move Corresponding. identification division.   program- id.   environment division.

Restrictions - procedure in statement, There are some restrictions when the...

There are some restrictions when these procedures are used. (i) The Procedure should not contain any SORT/MERGE statement. (ii) An explicit transfer of the control outside

.QUADRATIC EQN ROOTS, TO WRITE A QUADRATIC EQN ROOTS ARE COMPLEX IN COBOL P...

TO WRITE A QUADRATIC EQN ROOTS ARE COMPLEX IN COBOL PROGRAM

Examples - edit characters for numeric data, Examples - Edit characters for...

Examples - Edit characters for numeric data: The following illustration illustrates the use of Z editing characters. The character b is used to indicate the space character an

File activity, File Activity: The file activity is a measure of the pr...

File Activity: The file activity is a measure of the proportion of records processed during an update run. Therefore we define the activity ration as shown below. Activi

Program for indexed sequential file creation , PROGRAM FOR INDEXED SEQUENTI...

PROGRAM FOR INDEXED SEQUENTIAL FILE CREATION: We have to write a program to create an Indexed Sequential File in a dynamic mode for Student particulars. Suppose just 3 fields:

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