Let's take the dependencies F= {AB->CDEF, AF->ED, F->B} which ONE of the following is the highest normal form that a table R=ABCDEF could satisfy.Select any one from the following −No normal form would be satisfied.Boyce-Codd Normal Form1st Normal Form2nd Normal Form3rd Normal FormGiven Functional dependencies of F are as follows ... Read More

In the database management system there are several rules to manage the tables and do the changes like insertion, deletion, updatation and there are different stages at which the tables are organized and these stages are known as normal forms.It is a standard structure of relational databases in which a ... Read More

Multivalued dependency (MVD) is having the presence of one or more rows in a table. It implies the presence of one or more other rows in that same table. A multivalued dependency prevents fourth normal form. A multivalued dependency involves at least three attributes of a table.It is represented with ... Read More

A relation is in 3NF when it is in 2NF and there is no transitive dependency or a relation is in 3NF when it is in 2NF and all non-key attributes directly depend on candidate key.Third normal form (3NF) is the third step in normalizing a database and it builds ... Read More

Let us begin by understanding what a functional dependency is in the database management system (DBMS).Functional DependencyFunctional dependency refers to the relation of one attribute of the database to another. With the help of functional dependency, the quality of the data in the database can be maintained.The symbol for representing ... Read More

ProblemDraw of ER model for company considering the following constraints −In a company, an employee works on many projects which are controlled by one department.One employee supervises many employees.An employee has one or more dependents.One employee manages one department.SolutionFollow the steps given below to draw an ER model for the ... Read More

ProblemDraw an ER model for library management application considering the following constraints −In a library multiple students can enroll.Students can become a member by paying an appropriate fee.The books in the library are identified by a unique ID.Students can borrow multiple books from subscribed libraries.SolutionFollow the steps given below to ... Read More

ProblemDraw an ER model of the Banking database application considering the following constraints −A bank has many entities.Each customer has multiple accounts.Multiple customers belong to a single branch.Single customer can borrow multiple loans.A branch has multiple employees.SolutionFollow the steps given below to draw an ER model of the Banking database ... Read More

It is the relationship between the instances of two different entity types. Two entities will participate in the relationship.ExamplePerson and events are two different entity types which are related by using the relationship called “attends”.Mapping ER diagram with binary relationshipMapping one to many relationshipExampleHere, Create two tables for two entities.Primary ... Read More

The attributes that cannot be divided into sub-parts are called simple attributes. The attributes which can be divided into sub-parts are called composite attributes.ExampleBalance, account number are simple attributesName, address is called composite attributesLet’s consider an example of how to convert Entity Relationship (ER) model of composite attribute to Relational ... Read More