Entity relationship model, Database Management System

Assignment Help:

Let us first look into some of the important features of ER model.

Entity relationship model is a high-level conceptual data model.
It permits us to define the data involved in a real-world enterprise in terms of objects and their relationships.
It is widely used to develop a first design of a database.
It gives a set of useful concepts that make it convenient for a developer to move from a basic set of information to a detailed and defined description of information that can be easily executed in a database system.
It defines data as a collection of relationships, entities and attributes.

Related Discussions:- Entity relationship model

What are the reasons for having variable length records, What are the reaso...

What are the reasons for having variable length records? What are the various ways to store variable length records? Variable-length records arise in a database in various wa

Having clause-data manipulation language, Having clause This clause...

Having clause This clause is used for producing conditions on grouped information. Example: Find maximum salary and department number of those departments where maxim

Remove all transitive dependencies - dependency diagram, 1. Use the Invoice...

1. Use the Invoice table structure shown below to answer the following questions: a) Draw the dependency diagram and identify the primary key and all dependencies, including al

Compare the efficiency of the two mining processes, Consider the following ...

Consider the following database containing five transactions. Let min_sup = 60%. Mine all frequent itemsets using Apriori and FP-growth algorithm. Compare the efficiency of the t

Determine the two special events, What are two special events? The two ...

What are two special events? The two special events are as "entry" and "exit". Any action which is marked as linked to entry event is executed whenever given state is entered v

Two types of blocks in the fixed -length representation, What are the two t...

What are the two types of blocks in the fixed -length representation? Define them. Anchor block: Have the first record of a chain. Overflow block: Have the records other tha

Three level architecture, explain external view

explain external view

Explain deadlock detection and recovery, Explain Deadlock detection and rec...

Explain Deadlock detection and recovery Deadlock Detection - A deadlock is said to take place when there is a circular chain of transaction, every waiting for the release of a

Describe the benefits of OOD techniques, Describe the benefits of OOD techn...

Describe the benefits of OOD techniques OOD techniques are very useful for development of large and complex systems. It has been noted that large projects that are developed u

Explain what is rdbms, Explain what is RDBMS ? RDBMS - RDBMS is a datab...

Explain what is RDBMS ? RDBMS - RDBMS is a database management system (DBMS) which stores data within the form of relations. Relational databases are powerful since they need f

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages