Cases of constraint violations, Database Management System

Assignment Help:

(1)     Insert<1, 'Vipin', 20, 'Mayur Vihar'> into PERSON

Violated constraint: - Key constraint

Reason: - Primary key 1 already exists in PERSON.

Dealing: - DBMS could ask the user to provide valid PERSON_ID value and accept the insertion if valid PERSON_ID value is provided.

 

(2)     Insert<'null', 'Anurag', 25, 'Patparganj'> into PERSON

Violated constraint: - Entity Integrity constraint

Reason: - Primary key is 'null'.

Dealing: - DBMS could ask the user to provide valid PERSON_ID value and accept the insertion if valid PERSON_ID value is provided.

 

(3)     Insert<'abc', 'Suman', 25, 'IP college'> into PERSON

Violated constraint: - Domain constraint

Reason: - value of PERSON_ID is given a string which is not valid.

 

(4)     Insert <10, 'Anu', 25, 'Patpatganj'> into PERSON

Violated constraint: - None

Note: In all first three cases of constraint violations above DBMS could decline the insertion.


Related Discussions:- Cases of constraint violations

Process-oriented decompositions, Process-oriented decompositions Pr...

Process-oriented decompositions Process-oriented decompositions divide complex process, task or function into simpler sub processes until they get simple enough to be deal

Data handling and research methods, Data Handling and Research Methods: ...

Data Handling and Research Methods: The dataset encompassing 130 participants contains several variables measuring detrimental health related behaviours referring to the use o

What is an object design, What is an object design? Object design is a ...

What is an object design? Object design is a very interactive method, which decides the relationship among objects, classifies operations on classes, determines overall system

What is system r?what are its two major subsystems?, System R was develop...

System R was developed and designed over a period of 1974-79 at IBM San Jose Research Company. Its purpose was to illustrate that it is possible to create a Relational System tha

A table joined with itself is called, A table joined with itself is called ...

A table joined with itself is called ? A table joined with itself is known as self join table. Normal 0 false false false EN-IN X-NONE X-NONE

What is multiplicity in the associations, What is multiplicity in the assoc...

What is multiplicity in the associations? Give an example to explain multiplicity? Multiplicity in association indicate number of objects participate in any relationship. For

Name the various privileges in sql, Name the various privileges in SQL? ...

Name the various privileges in SQL? A) Delete B) Select C) Insert D) Update

How the one-to-one associations have to be implemented, Discuss how the one...

Discuss how the one-to-one associations have to be implemented. Some of properties of associations can be implemented directly by providing suitable declarations of the data me

What is a view in sql and when can views be updated, What is a view in SQL?...

What is a view in SQL? When can views be updated? A view is a virtual table which consists of columns from one or more tables. Through it is same to a table; it is stored in

What is indexed sequential file organization, What is indexed sequential fi...

What is indexed sequential file organization? What are the applications of this organization?  Ans: An index file can be employed to effectively overcome the problem of storing

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