Relational Data Modeling - Visualization

Data System Architecture


The vizualization of a relational data model is done as a sepecialized Entity relationship diagram.

Erd Graphical Notation

A best practice is to draw the child table above the parent table.


One way to see the different data models is to colour the relation by the main characteristic of their columns.

Colours Legends

Main attributes Colour
Business Keys Blue
Foreign Keys (Associations Details) Red
Attributes (Details) Yellow


3nf Color Star Schema Color
Data Vault Colour Data Vault Skeleton Colour

Documentation / Reference

  • Data Vault Presentation

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The entity-relationship (E-R) diagram is a diagram that helps visualize relational data models and shows relationships between relation (ie the entities) ER modeling technique was first developed by Peter...

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