Tutorial 7

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Tutorial 7, 2015/16-2
1. Using the STUDENT table structure shown above, do the following:
a) Write the relational schema and draw its dependency diagram. Identify all dependencies,
including all transitive dependencies.
b) Write the relational schema and draw the dependency diagram to meet the 3NF requirements
to the greatest practical extent possible. If you believe that practical considerations dictate using
a 2NF structure, explain why your decision to retain 2NF is appropriate. If necessary, add or
modify attributes to create appropriate determinants and to adhere to the naming conventions.
c) Using the results, draw the Crow’s Foot ERD.
2. To keep track of office furniture, computers, printers, and other office equipment, the FOUNDIT
Company uses the table structure shown above.
a) Given that information, write the relational schema and draw the dependency diagram. Make
sure that you label the transitive and/or partial dependencies.
b) Write the relational schema and create a set of dependency diagrams that meet 3NF
requirements. Rename attributes to meet the naming conventions, and create new entities and
attributes as necessary.
c) Draw the Crow’s Foot ERD.
The table structure shown above contains many unsatisfactory components and characteristics. For
example, there are several multivalued attributes, naming conventions are violated, and some attributes
are not atomic.
a) Write the relational schema and draw its dependency diagram. Label all transitive and/or partial
dependencies.
b) Draw the dependency diagrams that are in 3NF. (Hint: You might have to create a few new
attributes. Also make sure that the new dependency diagrams contain attributes that meet
proper design criteria; that is, make sure there are no multivalued attributes, that the naming
conventions are met, and so on.)
c) Draw the Crow’s Foot ERD.
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