Discuss the problem of spurious tuples, Database Management System

Assignment Help:

Discuss the problem of Spurious tuples and how we may prevent it.   

Ans:  A spurious tuple is, mainly, a record in a database that gets created while two tables are joined badly. In database-ese, spurious tuples are formed while two tables are joined on attributes which are neither primary keys  nor foreign keys. To prevent spurious tuples, avoid joining relations that consist of matching attributes that are not (foreign key, primary key) combinations as joining on such attributes may generate spurious tuples.


Related Discussions:- Discuss the problem of spurious tuples

Thid, describe objectivde of file organisation

describe objectivde of file organisation

Relational algebra and calculus, Q.  What is relational algebra and calcul...

Q.  What is relational algebra and calculus? Explain the relational algebra operators :- Selection and predicate, set operation, joins and division. Sol. Relational Algebra

What are the three classes of sql expression, What are the three classes of...

What are the three classes of SQL expression? SQL expression consists of three clauses:  Select  From  Where

Define the terms entity type and entity set, Define the terms i) Entity typ...

Define the terms i) Entity type ii) Entity set Entity type: An entity type describes a collection of entities that have the similar attributes. Entity set: The set of all en

What way a particular application views data from database, What is the way...

What is the way a particular application views the data from the database that the application uses? Sub schema is the way a particular application views the data from the data

Produce a set of relations - normalisation, Produce a set of relations (equ...

Produce a set of relations (equivalent to the Finkelstein entity list) in third normal form (3NF) from the following un-normalised relation. You must use the Finkelstein methodolog

Advantages to copying records from one table to another, What kind of advan...

What kind of advantages to copying records from one table to another? -) When an algorithm that modifies a table is used after that it's safer to work with the copy -) When

Lack of redundancy, Lack of Redundancy We have talked about the problems o...

Lack of Redundancy We have talked about the problems of repetition of information in a database. Such repetition should be stay away as much as possible. Let us state once again t

Customer service, as a customer service employee, explain five measures you...

as a customer service employee, explain five measures you would recommend a displeased student to patronise a school canteen

Client server databases, Client Server Databases- The concept behind the C...

Client Server Databases- The concept behind the Client/Server systems is simultaneous, cooperative processing. It is an approach that presents a one systems view from a user's vie

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