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

Database, i would like to ask if you will do assignment of database number ...

i would like to ask if you will do assignment of database number of words 1500 and how much

What are the various symbols used to draw an e-r diagram, What are the vari...

What are the various symbols used to draw an E-R diagram? Explain with the help of an example how weak entity sets are represented in an E-R diagram. Various symbols used to d

Define the term multimedia database, Question : (a) Explain with the h...

Question : (a) Explain with the help of appropriate examples the difference between ‘Data' and ‘Information'. (b) A digital image is an array of pixels, where each pixel h

What is magnetic disks, What is magnetic disks?explain it? Magnetic dis...

What is magnetic disks?explain it? Magnetic disk provides the bulk of secondary storage of modern computer system. The disk capacity is growing at over 50% per year. But the st

converting eerd, Create centralized relational database using Top down met...

Create centralized relational database using Top down method- Construction of Logical Model: Translation EERD into Relational Schema: Use the 8 steps algorithm of converting EERD

Creating database for library, i need help with creating database system fo...

i need help with creating database system for a library

A b-tree of order how much children m has maximum, A B-tree of order how mu...

A B-tree of order how much children m has maximum ? m has maximum m mchildren in a B tree.

I need helpin assignment, My cut off date is very soon in a Database subjec...

My cut off date is very soon in a Database subject and i dont know how to solve anything in it

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