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

Describes the several relationship constraints, Describes the several relat...

Describes the several relationship constraints through giving suitable example? Constraints on relationships: There are two kinds of constraints on relationships. 1) Mapping

Explain composite attribute in sql, Explain Composite attribute in SQL ? ...

Explain Composite attribute in SQL ? Composite attribute: A composite attribute has many components, each of that is atomic or composite.

What is a transaction? and how does it differs from update, wh

Note gate, i want notes on this topic

i want notes on this topic

Design an entity relation model, Funky Festivals Specification Funky Fe...

Funky Festivals Specification Funky Festivals organise music festivals which take place at various venues throughout the UK. A venue needs to be booked before a Festival can t

SQL, Ask Write the SQL code that will create the table structure for a tabl...

Ask Write the SQL code that will create the table structure for a table named EMP _1. This table is a subset of the EMPLOYEE table. The basic EMP_1 table structure is summarized in

Explain the disadvantages of using dbms, Explain the disadvantages of using...

Explain the disadvantages of using DBMS There could be a few disadvantages of using DBMS. As DBMS requires computers, we have to invest a good amount in acquiring the hardwa

Assign, #quesDefine a job scheduling strategy that will meet business requi...

#quesDefine 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 pi

Example of alter table command, Example - ALTER TABLE emp MODIFY (empno NUM...

Example - ALTER TABLE emp MODIFY (empno NUMBER (7));

Give an example of enforcement in typing, Give an example of enforcement in...

Give an example of enforcement in Typing. You can understand the idea of enforcement as it makes sure objects of dissimilar classes may not be interchanged as below: Exampl

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages