Diagram

A diagram is a two-dimensional geometric symbolic representation of information according to some visualization technique.

Entity-relationship

An entity-relationship model (ERM) is an abstract and conceptual representation of data, information aspects of a business domain or its process requirements



Parallel models data

Example

"Entity-relationship modeling is very parallel to object modeling except that object modeling models behavior as well as data and entity-relationship modeling only models data;the problem with learning entity-relationship modeling for this purpose is that in the present state of affairs most of the professionals who use entity-relationship diagram do not use them to depict a conceptual model"

from question  

One-to-many relationship between same entity in Core Data

"Unlike most people i prefer to make a sharp distinction between diagram that depict an entity-relationship model and ones that depict a relational model;contrary to prevailing opinion entity-relationship modeling isn t just relational lite"

from question  

What are the symbols for specializations and generalizations etc. in crow foot notation

Others

Example

Oo class diagram is more abstract and has more features than entity-relationship diagram

from question  

Is there any relationship with ER and class diagram?

Another article s the only conceptual modeling tool available for relational data the others - erwin and another article ilk - being at best logical modeling tools with nothing much better than entity-relationship diagram and ddl synchrnoization which are also provided by object role modeling tools

from question  

* (no title is found for this review)

First entity-relationship modeling is more than just an erd;we tend to try to put the entire entity-relationship model on one diagram

from question  

Why is a specific cardinality not allowed in the ERD?

Entity-relationship diagram aren t a good fit for document databases;the entity-relationship model supports many-to-many binary as well as ternary and higher relationships composite keys and attributes on relationships all of which aren t directly supported in hierarchical network model dbmss

from question  

Why we don't draw ER for NoSQL databses

An entity-relationship diagram is more abstract;sql server let you create a physical data model diagram that could come from a entity-relationship diagram or not

from question  

Is database diagram in SQL Server Management Studio considered as ER diagram?

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