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sequential file creation and rewritingwe have to write a program to create a student file with just two fields sno ie student number and same ie
there are some restrictions when these procedures are usedi the procedure should not contain any sortmerge statementii an explicit transfer of the
transaction filea transaction file is a file which contains new records those changes to old records which are used to update the master filethe
file updationthe method of modifying an old file with present information is termed as file updatingmaster filea master file is a file which is used
rules for simple sort verbthe work file is to be defined by a sort elaboration entry sd entrythe format of sd entry is as shown belowthe rules below
the simple sort verbthe process of sequencing the records in some preferred manner is termed as sorting the sorting is done upon some key data item
errorlevel -302 prevents error code for this chipset config 0x373a chip config pic spec page 146 processor
nasm assembly language program consider a sequence of 19 strictly positive decimal digits most likely stored in an array there are
file volatilityfile volatility associates to the number of times the updating of records are needed during some time periodfile interrogationsome
file activitythe file activity is a measure of the proportion of records processed during an update runtherefore we define the activity ration as
selection of file organizationwhile designing a file the programmer should select an appropriate association for a file the order in which the choice
direct organizationbesides the relative or indexed organization also a direct access file can be designed to have what is termed as direct
declarative and file status clausethe input-output exception condition in the situation of a direct access files can be handled by a declarative
file description for the relative and indexed filesthe fd entry for a relative or an indexed file is similar to that of a sequential file some
start statementthe start statement places the files to the initial logical record whose record key satisfies the condition specified by the key
delete statementthe file should be opened in the i-o mode if the access is sequential the invalidkey phrase must be specified rather than the last
rewrite statementas in the situation of a relative file the rewrite statement needs that the file should be opened in the i-o mode and if the
write statementthe records are written to be logical place as determined from the value of the record key the invalid key condition occurs in the
procedure division statements for the indexed filesall the statements which are available for a relative file are also available for an indexed
indexed sequential filesin the indexed sequential files which are also known as indexed files the records are stored in the sequence order generally
delete statementthe format of the delete statement is as shown belowdelete file-name record invalid key
rewrite statementthe rewrite statement has the format for a relative file as shown belowrewrite record-name form identifier
write statement the write statement for a relative file has the format which is as shown below
rules of read statementsthe next record is identified according to the rules as shown belowi whenever the read next statement is the initial
common form of the read statementsformat 1 is the common form of the read statementsformat 2 is used when the access mode is either random or dynamic