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

Dbms built for online transaction processing, Problem: A DBMS built for...

Problem: A DBMS built for Online Transaction Processing (OLTP) is usually regarded as unsuitable for data warehousing. Each system is designed with a different set of requireme

Determine the steps of path in association network, Determine the steps of ...

Determine the steps of path in association network You can analyse use of paths in association network in the following steps: Examine every operation and see what asso

Define lock, Define lock? Lock is the most common used to execute the r...

Define lock? Lock is the most common used to execute the requirement is to permit a transaction to access a data item only if it is currently holding a lock on that item.

What is rigorous two phase locking protocol, Differentiate strict two phase...

Differentiate strict two phase locking protocol and rigorous two phase locking protocol. In strict two phase locking protocol all exclusive mode locks taken by a transaction is

Explain stand alone query language in details, Explain Stand Alone Query La...

Explain Stand Alone Query Language in details? Stand alone Query Language - The query language that can be used interactively is known as stand alone query language. It does no

Define an operator that a relational algebra does not have, Define an opera...

Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.

What is relational algebra, What is Relational Algebra? Relational algebr...

What is Relational Algebra? Relational algebra is a Procedural query Language?

Problem about data mining for business intelligence, Do the 11.1 11.1 Cre...

Do the 11.1 11.1 Credit Card Use. Consider the following hypothetical bank data on consumers’ use of credit card credit facilities in Table 11.3. Create a small worksheet in Exce

Example of grant create session to mca12, Example -GRANT CREATE SESSION TO ...

Example -GRANT CREATE SESSION TO MCA12; (This command gives system level permission on creating a session - not portable) GRANT SELECT ON EMP TO MCA12; (Object level permi

Explain the functional mode with help of an example, Explain the Functional...

Explain the Functional Mode with help of an example. Functional Model The functional model shows a computation and functional derivation of data values in it without ind

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages