Initial ER Diagram - Normalisation - IT Assessment Answer

IT Assessment Task

QUESTION 1

(Practical) Submission must include:

 Initial ER diagram

 Normalisation

 Mapping to tables

 Documentation rough work (if any) Initial ER diagram Draw an ER diagram which must indicate the following:

 Optionality of relationships (may or must)

Cardinality of relationships (one or many)

 Optionality of attributes

 Clear indication of PKs and FKs

 Named relationships and entities Use normalisation

 Place the attributes in zero normal form.

 Normalise the attributes to third normal form. Show each of the intermediate normal forms.

 Draw an ER diagram from the third normal form.

Describe each attribute and its function in the system.

Describe possible changes when mapping to an actual database.

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