Define integrity, Database Management System

Assignment Help:

(a) Explain briefly the three parts of a relational Model.

(b) Contrast the following terms with an appropriate example:

(i) stored attribute v/s derived attribute
(ii) entity type v/s entity instance
(iii) strong entity type v/s weak entity type
(iv) simple attribute v/s composite attribute
(v) unary relationship v/s binary relationship.

(c) The term integrity refers to the accuracy or correctness of the data in the database. Define the following terms:

(i) Domain Integrity
(ii) Entity Integrity
(iii) Referential Integrity.

(d) Constraints are rules that restrict the data values that you can enter into a field in a database table. Briefly describe the following constraint with appropriate example for each:

(i) Check Constraint
(ii) Not Null Constraint
(iii) Unique Constraint


Related Discussions:- Define integrity

Primary interface between a visual basic application, Question (a) Visu...

Question (a) Visual Basic is governed by an event processor. Explain the meaning of this phrase. (b) Differentiate between an general procedure and event procedure. (c)

Hello, Java program for horrizontal fragmentation in distributed database

Java program for horrizontal fragmentation in distributed database

What is the use of keyword isa, What is the use of keyword ISA? The use...

What is the use of keyword ISA? The use of keyword ISA is to show that a class is a specialization of another class.

Which model is record based logical model, Which model is record based logi...

Which model is record based logical model? Network Modelis basically known as record based logical model.

Need for multiple access paths, Need for Multiple Access Paths In pract...

Need for Multiple Access Paths In practice, most of the online information systems need the support of multi-key files. For example, consider a banking database application hav

What are advantages of object-oriented programming paradigm, What is the ma...

What is the major advantage of object-oriented programming paradigm? The ability to modify the explanation of an object without affecting the rest of the system is the main adv

Assignment, how does Btree differ from a B+ - tree?

how does Btree differ from a B+ - tree?

Explain what is aggregation, Explain what is Aggregation? Aggregation:...

Explain what is Aggregation? Aggregation: Aggregation is an significant concept in database design whereas composite objects could be modelled during the design of database a

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