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Conceptual,Logical and Physical model RRS feed

  • Question

  •  

    What is the difference b/w Conceptual,Logical and Physical ER model
    Monday, July 28, 2008 7:09 AM

Answers

  •  dvilchez wrote:
    LV:
    What is the correct answer?

     

    These are basic notions if you know what a data model and data modeling is.

     

    But, here is an attempt at a parallel for the OO oriented:

     

    Conceptual <-> Analysis (conceptual analysis) WHAT-WHAT

    Logical <-> OOA (technical analysis) WHAT-HOW

    Physical <-> OOD (technical design) HOW-HOW

     

    (Remember: it's just a *parallel*, not even so rigorous.)

     

    You won't get it until you break out of the tech-egg, and get what ANALYSIS and the whole CONCEPTUAL thing really is.

     

    BTW, to the OP I would suggest Google. Unless s/he has some specific questions or doubts...

     

    -LV

    Monday, July 28, 2008 2:59 PM

All replies

  • There is no difference between conceptual and logical diagram. The physical diagram is the implementation of logical diagram for specific database.
    Monday, July 28, 2008 10:06 AM
  • dvilchez:

     

    > There is no difference between conceptual and logical diagram.

     

    Wrong.

     

    > The physical diagram is the implementation of logical diagram for specific database.

     

    Wrong.

     

    Wrong.

     

    -LV

    Monday, July 28, 2008 2:16 PM
  • LV:
    What is the correct answer?
    Monday, July 28, 2008 2:41 PM
  •  dvilchez wrote:
    LV:
    What is the correct answer?

     

    These are basic notions if you know what a data model and data modeling is.

     

    But, here is an attempt at a parallel for the OO oriented:

     

    Conceptual <-> Analysis (conceptual analysis) WHAT-WHAT

    Logical <-> OOA (technical analysis) WHAT-HOW

    Physical <-> OOD (technical design) HOW-HOW

     

    (Remember: it's just a *parallel*, not even so rigorous.)

     

    You won't get it until you break out of the tech-egg, and get what ANALYSIS and the whole CONCEPTUAL thing really is.

     

    BTW, to the OP I would suggest Google. Unless s/he has some specific questions or doubts...

     

    -LV

    Monday, July 28, 2008 2:59 PM