Modelling and Normalization

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Modelling & Normalisation

Task

Normalisation

Using the given table/relation, do the following:

1. Draw a dependency diagram to show the functional dependencies in the relation

2. Decompose the following table into a set of 3NF relations

3. Draw a relational schema for your 3NF relations and show the referential integrity constraints. Manually drawing the dependency diagrams is not acceptable.

Trainer_ID	Trainer_Name	Room_No	Room_Seats	Class_Session	Class_Name	Class_Day	School
101	Alana Fredrick	54A	36	9:00	ITC114	Mon	Computing
102	George Edwards	22	28	9:00	ITC333	Mon	Computing
103	Lilly Nelly	59	38	12:30	BUS350	Tues	Business
104	Eddy Brown	53	30	12:30	ITC114	Thurs	Computing
102	George Edwards	59	38	4:00	ITC504	Fri	Computing
103	Lilly Nelly	18	24	12:30	BUS360	Wedn	Business
102	George Edwards	53	30	9:00	ITC201	Wedn	Computing
105	Sam Wang	22	28	4:00	ITC556	Tues	Computing
106	Yifeng Chong	58	38	9:00	ITC556	Thurs	Computing

Rationale

This assessment item is designed to test your understanding of the normalisation process based on existing data in order to minimise redundancies and data anomalies.

Marking criteria

The marking criteria for this assignment are:

Task	HD	DI	CR	PS	FL
Decompose relation into 3NF and show relational schema for each relation and referential integrity constraints	All relations in 3NF and all partial and transitive dependencies removed, each relation shows correct referential integrity constraints	All relations in 3NF and all partial and transitive dependencies removed, each relation shows referential integrity constraints	All relations in 3NF and all partial and transitive dependencies removed, most relations show referential integrity constraints	All relations in 3NF and all partial and transitive dependencies removed, some relations show referential integrity constraints	Incomplete decomposition or relations not in 3NF, no relations show integrity constraints
Create an ERD & show all entities, PK & KF attributes, relationships, cardinality & optionality	Comprehensive and accurate ERD that contains all entities, PK and FK attributes, associative entities included if required, all relationships shown and identified with correct cardinality and optionality	Detailed and accurate ERD that contains all entities, PK and FK attributes, associative entities included if required, all relationships shown and identified with correct cardinality	Thorough & reasonably accurate ERD that contains all entities, PK and FK attributes, associative entities included if required, all relationships shown with correct cardinality	Adequate ERD that contains most entities, PK and FK attributes, associative entities included if required, all relationships shown with cardinality	Incomplete or irrelevant ERD that contains some entities, relationships, and cardinality