Components of a typical database environment, Database Management System

Assignment Help:

Question:

(a) List four disadvantages of the File Processing System as compared to the Database Systems.

(b) The integrity of a database is enforced by integrity rules. One of these rules, the referential integrity rules, states that the database must not contain any unmatched foreign key values.

(i) Discuss what should happen on an attempt to delete the target of a foreign key reference?

(ii) Discuss what should happen on an attempt to update the primary key of the target of a foreign key reference?

Your discussion should describe the three possible techniques which can be used to deal with the problem, and provide one example for each technique.

(c) List and describe briefly the nine components of a typical database environment.

(d) Explain the difference between external, internal and conceptual schemas. How are these different schema layers related to the concept of logical and physical data independence?


Related Discussions:- Components of a typical database environment

What is predictive modelling, Problem: (a) Data mining is one of the b...

Problem: (a) Data mining is one of the best ways to analyse data and using software techniques, hidden and unexpected patterns and relationships in sets of data can be extrac

List some security violations, List some security violations (or) name any ...

List some security violations (or) name any forms of malicious access. A) Unauthorized reading of data B) Unauthorized modification of data C) Unauthorized destruction of

Synonyms, Synonyms It allows short names or alternative names for objects....

Synonyms It allows short names or alternative names for objects. Example :               CREATE SYNONYM D30               FOR EMPD30;   Now if we give command:

Determine the persistent object, Determine the Persistent object Persis...

Determine the Persistent object Persistent object can be stored in one of the following: Files Cheap, permanent, simple storage Low level (Write, Read) Ap

Primary key, The primary key is selected from the

The primary key is selected from the

Method of analyzing association traversal, Analyzing Association Traversal ...

Analyzing Association Traversal Till now, we have supposed that associations are bi-directional. But in the case of traversal, it is in only one direction in any application,

#title., WHY SHOULD NULL IN A RELATION BE AVOID AS possible?

WHY SHOULD NULL IN A RELATION BE AVOID AS possible?

Describe file organisation, Describe file organisation? A file is organ...

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

Query optimization in database system, Problem : AirwaysCentre, an inte...

Problem : AirwaysCentre, an international airline booking company currently uses a relational database system for their operations, which includes the following relations: P

Example for while until, Assume you are given a uniprocessor system with on...

Assume you are given a uniprocessor system with one gigabyte of memory and a 300 gigabyte disk. The OS on the machine has a demand paged virtual memory system with a local page rep

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