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Describe file organisation?
A file is organized logically as a sequence of records. These records are mapped onto disk blocks.
A) Fixed-Length Records
Type deposit=record
Accountnumber:char(10);
branch name:char(22);
balance: real;
end
B) Variable length records
a) storage of multiple record types in a file
b) Record types that allow variable lengths for one or more fields
c) Record types that allow repeating fields
d) Byte string Representation
e) Fixed length representation
Explain P command in the respect of QBE? P: It is the command in which is used to print (logically display) the value of the attribute in whose cell it is writ
Company Database: a-)Here is the ER Model b-)Here is the Relational Model: IMPORTANT NOTICE FOR SOLUTION TYPE: ***THIS ASSIGNMENT WILL BE SOLVED BY THE
Can your organization scan large format documents? Yes, large format scanning used for such entities as city plans and blueprints is available. We selected scanners with the ab
Objectives After reading this unit you should be able to: Explain storage of databases on hard disks; Discuss the execution of various file Organisation techniques;
This language that enable user manipulate to or access data as organized by appropriate data model. Low level or Procedural DML : DML needs a user to specify what data ar
MOSS VALE is a town with 15000 inhabitants. The fire department wishes to develop a system that automates the despatch of fire engines to attend fires. The ERD below describes the
How can Redundant Associations be done It can be done by asking questions: i) Is there a specific arrangement of network which would optimize critical aspects of completed
how oracle can be used
What is the full form of ODBC ? ODBC stands for Open Database Connectivity.
a brief definition
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