Explain about the e-r diagram, Software Engineering

Assignment Help:

Explain about the E-R Diagram

Entity-relationship (E-R) diagram is detailed logical representation of data for an organisation. It is data oriented model of a system while DFD is a process oriented model. ER diagram represent data at rest whereas DFD tracks the motion of data.

ERD doesn't provide any information regarding functionality of data. It has 3 main components - data entities, their relationships and their associated attributes.

 

 


Related Discussions:- Explain about the e-r diagram

What is the purpose of symbol table, Problem 1 . What is the purpose of Sym...

Problem 1 . What is the purpose of Symbol Table? Write a brief note on various Data structures used in implementing Symbol Tables Stating Purpose Writing note on various D

Explain logarithmic poisson execution time model, Q. Explain Logarithmic Po...

Q. Explain Logarithmic Poisson Execution Time Model? This model is as well developed by Musa et Al (MUSA79). The breakdown intensity function is different here as compared to B

What is syntax, 1) The relationship between characters or groups of charact...

1) The relationship between characters or groups of characters independent of their meanings or the manner of their interpretation and use; 2) The formation of expressions in a

30 60 90 TRIANGLES, Find the length of the hypotenuse. With a short side of...

Find the length of the hypotenuse. With a short side of radical 3 and a long side with 3 radical 2 Simplify the radical if you can.

What are the merits of incremental model, What are the merits of incrementa...

What are the merits of incremental model? i. The incremental model can be adopted when there is less number of people included in the project. ii. Technical risks can be ma

The software life cycle model that incorporates risk factor, Explain the so...

Explain the software life cycle model that incorporates risk factor.  The problem with traditional software process models is that they do not deal adequately with the uncertai

What are the different types of cohesion, What are the different types of C...

What are the different types of Cohesion? i. Coincidentally cohesive -The modules in which the set of tasks are related with each other loosely then such modules are known as

Explain exhaustive testing, Implementing the program with all possible comb...

Implementing the program with all possible combinations of values for program variables. Feasible only for small, simple programs.

Define traceability, Define Traceability Traceability is the overall...

Define Traceability Traceability is the overall property of requirements specification which reflects the easiness of finding related requirements. Three different parts

What is brainstorming, A group process for generating original and diverse ...

A group process for generating original and diverse ideas.

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