EMPLOYEE(ID, First, Last, Team, Dept, Salary)
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.)
Answers: 1
Computers and Technology, 22.06.2019 10:50, whocares1234
A911 dispatcher is the sole sender of messages to all police officers. while on patrol, officers communicate with the dispatcher who, in turn, relays messages to other officers. the officers do not communicate directly with one another. this illustrates a network.
Answers: 1
Computers and Technology, 22.06.2019 11:00, babbybronx
Lisa’s company, abc ltd., lost its biggest client and is now facing a financial crunch. most of her colleagues have resigned, but lisa decides to stay with the company and assist the management in overcoming the financial situation. which quality is lisa demonstrating? a. self-management b. cooperativeness c. responsibility d. loyalty
Answers: 2
Computers and Technology, 23.06.2019 03:00, SKYBLUE1015
What are the different parts of computer
Answers: 2
Computers and Technology, 23.06.2019 16:30, jessisjawsome
If i wanted to include a built-in calendar in a document, what option could i select? draw table insert table insert chart quick tables
Answers: 1
Consider the universal relation
EMPLOYEE(ID, First, Last, Team, Dept, Salary)
EMPLOYEE(ID, First, Last, Team, Dept, Salary)
Social Studies, 13.07.2019 18:40
History, 13.07.2019 18:40