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

Rules for occurs clause, RULES FOR OCCURS CLAUSE: The rules apply for ...

RULES FOR OCCURS CLAUSE: The rules apply for the OCCURS clause and the subscripts are as shown below. (1) The integer in the OCCURS clause should be a positive integer.

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

Value clause - cobol programming, VALUE CLAUSE: The value clause defin...

VALUE CLAUSE: The value clause defines the preliminary value of the data item. Normally initialization will be completed just before the first statement in the procedure di

Floating insertion - , Floating Insertion   The currency symbol ($) c...

Floating Insertion   The currency symbol ($) can emerge in multiples on the left-hand side of the picture. In this situation the character will be treated in similar way as t

Numeric literals - cobol program, Numeric -   Literals : The numeri...

Numeric -   Literals : The numeric literal can be created with the help of digits only. It can have a sign (+ or -) and can also have a decimal point. If no sign is specifi

Divide verb, DIVIDE VERB: The aim of the DIVIDE verb is to divide one ...

DIVIDE VERB: The aim of the DIVIDE verb is to divide one number by the other and to store the result.  There are few forms of this verb. One of its forms is as shown below:

Arithmetic verbs, ARITHMETIC VERBS: Most of the problems need some com...

ARITHMETIC VERBS: Most of the problems need some computations to be performed on the input or intermediate data that are numeric in nature. The Arithmetic verbs are used to pe

Filler clause - cobol programming, FILLER CLAUSE: Consider the stateme...

FILLER CLAUSE: Consider the statements as shown below: 1)  01    f    pic     x(80)  value    all "-". This statement origins a line of 80 characters filled with "-"

Abbreviation of compound condition, Abbreviation: The Consecutive rela...

Abbreviation: The Consecutive relational conditions in a compound condition can be abbreviated in many cases as shown: (i) When the subjects in the consecutive relational c

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

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