Define first normal form and second normal form, Database Management System

Assignment Help:

First Normal Form and second normal form

First Normal Form (1NF)

A relation is said to be in 1NF if it having no non-atomic values and each row can give a unique combination of values.

Second Normal Form (2NF)

A relation is said to be in 2NF f if it is already in 1NF and each attribute fully depends on the primary key of the relation. Speaking inversely, if a table has some attributes which is not dependant on the primary key of that table, and then it is not in 2NF.

Related Discussions:- Define first normal form and second normal form

Differences among the candidate keys and the primary key, Discuss the diffe...

Discuss the differences among the candidate keys and the primary key of a relation. Give instance to describe your answer? A candidate key is one that can be used as primary ke

What is a built-in, What is a Built-in A notation of identity is built-...

What is a Built-in A notation of identity is built-into the data model or programming language and no user-supplied identifier is needed. This form of identity is used in objec

Greater potential for bugs and increased processing overhead, Greater poten...

Greater potential for bugs: Since the sites of a distributed system operate simultaneously, it is more complex to ensure the correctness of algorithms. The art of constructing dis

Data, Explain three main attributes of data.

Explain three main attributes of data.

Illustrate about the advanced object design, Illustrate about the advanced ...

Illustrate about the advanced object design Advanced object design is a complex task. The objects discovered through analysis serve as a skeleton of design. The operations reco

Apriori algorithm-find all frequent large itemsets, Your friend owns a comp...

Your friend owns a computer store in Yuen Long, selling Desktop and Notebook PCs and other computer peripherals. Having been rather successful with his business there, he decided t

Dataware house, ) Define a job scheduling strategy that will meet business ...

) Define a job scheduling strategy that will meet business requirement of reporting availability by 6am CST for the following cubes? Show the job scheduling dependencies in a picto

Transaction managenment, can you please explain with the help of suitable e...

can you please explain with the help of suitable example the difference between conflict equivalence and conflict serializability?

HIT, Meaningful use refers to the use of certified EHR technology to "enhan...

Meaningful use refers to the use of certified EHR technology to "enhance quality, efficiency, and reduce health disparities

Object oriented database, object oriented database

object oriented database

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages