EMPLOYEE(ID, First, Last, Team, Dept, Salary)
![subject](/tpl/images/cats/informatica.png)
Computers and Technology, 07.03.2020 00:17 bnnn
Consider the universal relation
EMPLOYEE(ID, First, Last, Team, Dept, Salary)
with the following set F of functional dependencies:
ID -> First
ID -> Last
First, Last -> ID
Last -> Team
ID -> Dept
ID -> Salary
Salary -> Dept
a. Identify candidate keys of EMPLOYEE.
b. Construct a decomposition of EMPLOYEE into relations in 3NF that preserves dependencies. How can you be sure that your decomposition is dependency-preserving?
c. Are all of the relations in your decomposition in BCNF? Either explain why they are, or identify one that is not and explain why it is not. (Note that for a relation to be in BCNF, the determinants of all functional dependencies in the relation must be superkeys of that relation – not superkeys of the original universal relation.)
![ansver](/tpl/images/cats/User.png)
Answers: 1
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Consider the universal relation
EMPLOYEE(ID, First, Last, Team, Dept, Salary)
EMPLOYEE(ID, First, Last, Team, Dept, Salary)
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