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FILE-CONTROL paragraph for the indexed files:
The common format for the SELECT clause for a file is as shown below:
SELECT file-name ASSIGN TO implementor -name
The ORGANIZATION clause specifies that the file is an indexed file. The RECORD KEY clause indicates the record key data item on the basis of which the file is sequenced. The field that is specified in the RECORD KEY clause (data-name-1) is also termed as the primary key. Whereas the files are stored on the basis of the prime key, that is the records of an alternative key.
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
Illustration of the abbreviation: A few illustration of the abbreviation are given below: Illustration: The compound condition AMOUNT GREATER THAN 499 AND AMOUNT L
REWRITE STATEMENT: The REWRITE statement has the format for a relative file as shown below, REWRITE record-name [ FORM identifier ]
PROGRAM TO DEMONSTRATE MERGE VERB: The two files for which a record having 2 fields viz. Account Number and Name are already available. Now Merge these two files and create a
PROGRAM FOR IF : We have to write a program to check whether the given number is ODD or EVEN. Identification division. Program- id. Ifst. Environment division.
Illustration of Divide verb: (a) DIVIDE 5 INTO A. If the value of A is 20, then after execution of this statement the value of A will be 4. The older value of A will be los
FILE CHARACTERISTICS: The task of file handling is the responsibility of the system software termed as IOCS (Input-Output control system). Record Size: We know that th
Rules for Simple sort verb: The work file is to be defined by a sort elaboration entry (SD entry).The format of SD entry is as shown below. The rules below should be taken
CLASS CONDITION: The class condition establishes whether or not the value of the operand is numeric or alphabetic. The operand is numeric if it contains only the digits 0 t
MULTI-DIMENSIONAL TABLES: The type of table which has been considered above is known as one-dimensional table. Whenever a table is such that each of its elements in turn is a
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