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 Business Analyst  |  Question 10 of 122    Print  
What is the difference between data model and an entity relationship diagram?

  
Total Answers and Comments: 1 Last Update: February 15, 2007     Asked by: RajivPrasad 
  
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February 15, 2007 02:10:02   #1  
Shridatt Kelkar        

RE: What is the difference between data model and an e...
A data model is a model which shows how data is stored and used for eg a normal databaseIt has 3 main parts1)Structural part:- how data is structured2)Intergrity part:- Rules governing structure3)Manipulation part:- operators used to select,update,querry that data,eg select,update,delete commands in sqlTo furhter add Data Modelling is when we add this theory to Live instance.ENTERPRISE DATA MODEL(ENTERPRISE RELATIONSHIP MODELING) :- This can be called as an conceptual model or semantic modelThe sub parts of an ERM are1)Entity:- It is an object,eg employees,computer2) Relationship:- It captures how two or more entities are related to each other3)Attributes:- Every entity has its own sets of atributes (eg PAN no in India for each employee or SSN in US)To clarify the point look at egA employye is an entity belonging to entity sets(All employees) which has a relationship with department,and attributes is emp code
 
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Latest Answer : A data model is a model which shows how data is stored and used for eg a normal databaseIt has 3 main parts1)Structural part:- how data is structured2)Intergrity part:- Rules governing structure3)Manipulation part:- operators used to select,update,querry ...

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Hello,I would like to know about where to start get familiar with this field as i would like to start my career as Business Analyst and i hold M.B.A in information Technology but still some new concepts are there i am absolutely not familiar with.Can some suggest me any case study or project i should start from and get familiar with each and every steps involved in this with the help of developing that project/case study by myself. One more thing i would like to know that all the use cases/activity
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Latest Answer : A use case is written from a "user" perspective describing the interaction of a piece of software between the user and the software.  These are written in common language typically from the business or user point of view and in enough detail ...
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What are the contents that go into the object model and domain model during GAP analysis. how are the AS-IS and To-BE system documentation prepared
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What are the difference between high-level and low-level use case? How can a business analyst performs that job?
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View Question | Asked by : shassan

Latest Answer : Map it to MVC: Control is Controller class, Boundary is a presentation layer class such as JSP and Entity is your bean class that interacts with data layer. Cheers! ...
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View Question | Asked by : hasan

Latest Answer : @ The question should be open ended for chances exist for obtaining some information or possibility which a person would have never thought.Demerit: Evaluation becomes a bit difficult.@ The question should doesnot give idea about the intended idea about ...
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