Discuss in detail about data modeling, Software Engineering

Assignment Help:

Discuss in detail about data modeling.

  • Data modelling makes use of the ERD.
  • Consists of three interconnected information.

The data object.

Attributes.

Relationships.

Cardinality and Modality

  • Cardinality means the specification of the number of occurrences of one object that can be linked to the number of occurrences of another object.
  • One-to-one cardinality.
  • One-to-many cardinality.
  • Many-to-Many cardinality.
  • Modality of a relation is 0 when no explicit relationship or relation is optional.
  • Modality is 1 when occurrence of relationship is mandatory.

Entity/Relationship Diagrams

  • Elements are

Data Objects.

Attributes.

Relationships.

Various type indicators.

 


Related Discussions:- Discuss in detail about data modeling

Explain v- diagram, Normal 0 false false false EN-IN ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Software development plan , Phone Company (WLPC) is a provider of wireless ...

Phone Company (WLPC) is a provider of wireless phone service in the US with 100,000 customers serving mostly small markets. WLPC has just purchased additional airwaves in the US, C

Define the level 1 of maturity model, Define the Level 1 of maturity model ...

Define the Level 1 of maturity model At this maturitylevel,software is developed an ad hoc basis and nonstrategic technique is used for its development. Success of developed s

What is procedure, What is Procedure? Ans) The step-by-step method follo...

What is Procedure? Ans) The step-by-step method followed to make sure that standards are met.

The advantages of using these specific languages of srs, What are the advan...

What are the advantages of using these specific languages of SRS?      The major benefit of using a natural language is that both client and superior understand the language. T

Illustrate parameterization in qtp, Illustrate parameterization in QTP. ...

Illustrate parameterization in QTP. - Parameterization - Passing values from external source into script. - The number of values passed can be single or multiple. - It he

State sandwich testing, Define sandwich testing. Testing combines the i...

Define sandwich testing. Testing combines the ideas of both bottom-up and top-down testing by defining a certain target layer in the hierarchy of the module. The modules below

What is ripple effect, What is ripple effect?       The ripple effect i...

What is ripple effect?       The ripple effect is a term used to describe a situation where, like the ever expanding ripples across water when an object is dropped into it, an

Task set, task set for a project plan

task set for a project plan

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