Exercise “Project” -2
1. Using your knowledge of BITS, determine the functional dependencies that exist in the
following table. After determining the functional dependencies, convert this table to an
equivalent collection of tables that are in third normal form:
2. List the functional dependencies in the following table that concern invoicing (an
application BITS is considering adding to its database), subject to the specified
conditions. For a given invoice (identified by the InvoiceNum), there will be a single
client. The client’s number, name, and complete address appear on the invoice, as does
the date. Also, there may be several different tasks appearing on the invoice. For each
task that appears, display the TaskID, description, category, and price. Assume that each
client that requests a particular service task pays the same price. Convert this table to an
equivalent collection of tables that are in third normal form:
3. BITS wants to store information about the supervisors, including their supervisor number
and the relationship to consultants. Supervisors can work with multiple consultants, but
consultants only have one supervisor. In addition, supervisors specialize in working with
clients in specific task categories. Using this information, convert the following
unnormalized relation to fourth normal form:
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