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

Blank insertion and zero insertion, B (Blank Insertion) : The occurren...

B (Blank Insertion) : The occurrence of a B anyplace in the picture will insert a space character in the edited data. There can be more than one B in the picture. Examples:

Comparison of nonnumeric operands - relational condition, Comparison of Non...

Comparison of Nonnumeric Operands: A nonnumeric operand can be compared to the other nonnumeric operand according to the rules as shown below: (i) Fields of Equal Sizes:

Minus sign - edit characters for numeric data , Minus sign - edit character...

Minus sign - edit characters for numeric data: The minus sign can appear either at the leftmost or rightmost location of the picture. If an item is negative, a minus sign will

Example of write statement, Example of Write statement: Illustration:...

Example of Write statement: Illustration: (i) WRITE TRANS-RECORD AFTER ADVANCING 3 LINES. This WRITE statement specified that the TRANS-RECORD is a record name of a fi

Special-names - configuration section, SPECIAL-NAMES: This paragraph i...

SPECIAL-NAMES: This paragraph is used to associate some hardware names to the user-specified mnemonic names. This paragraph is elective in all compilers. The format of this pa

Program for perform - varying, PROGRAM FOR PERFORM - VARYING: We have ...

PROGRAM FOR PERFORM - VARYING: We have to write a program to elaborate PERFORM ...VARYING Identification division. Program- id. PerfVary. Environment division. Dat

Sequential files, SEQUENTIAL FILES:   The purpose of the proposed sec...

SEQUENTIAL FILES:   The purpose of the proposed section is to introduce the concepts such as File characteristics, File Description for Fixed-Length Records, File-Control

Common form of the read statements, Common form of the READ statements: ...

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,

Example of if- else statement, Example of If- else statement Illustrat...

Example of If- else statement Illustration:   IF   QUANTITY IS NUMERIC AND QUANTITY IS POSITIVE          MOVE ZERO TO ERROR-CODE. COMPUTE SALES VALUE=QUANTITY*RATE

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