ICT307 Week 9 Tutorial
Learning objective:
Logical data modelling for Systems Design (assessment 3 requirement)
Introduction:
A logical data model describes the data to a greater extent than the conceptual model (ERD).
You have already created the conceptual data model in assessment 2: Systems analysis. Now
in assessment 3, you need to convert the conceptual data model to the corresponding logical
data model. Logical data model includes all the entities, relationships and attributes. These
attributes denote the characteristics or properties of an entity. Additionally, a logical data
model also consists of a primary key and a foreign key. A logical data model is a model that
describes the data as much detail as possible, without regard to how they will be physically
implemented in the database.
Example of conceptual data model
Example of logical data model
Exercise: based on assessment 2 ERD, your group is to convert the conceptual data model to
the logical model by introducing full set of attributes and primary key/foreign key so details
of the data model can be presented.