Question: a . If X - > Z and X - > Y , then X - > ( Z , Y ) . What functional

a. If X -> Z and X -> Y, then X ->(Z,Y). What functional dependency rule does this demonstrate?
b. If A -> B and B -> C, then A -> C. What is the name for this type of functional dependency?
c. Use a formula like the above to show the decomposition rule.

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer
Step: 1 Unlock blur-text-image
Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock
Step: 3 Unlock

Students Have Also Explored These Related Databases Questions!

Q:

Question 3 ( 1 point ) There is an entity with three attributes: X , Y , and Z . The only candidate key for the entity is a composite of both x and Y together. If there is a functional dependency...

Q:

Prolog: In class I showed a simple family tree example of the basic capabilities of Prolog. On the class web page you will find a brief Prolog tutorial that uses that same example. To help you...

Q:

The following exercises concern the relational schema R = ABCDEG and instance r of this schema depicted in Table 1 below. ABCDEG a1 b1 c1 d1 e1 g1 a2 b2 c1 d2 e2 g2 a2 b2 c1 d2 e2 g3 a3 b3 c3 d2 e3...

Q:

3 . Identify the functional dependency rule for each of the following items: a . If X - > Z and X - > Y , then X - > ( Z , Y ) . What functional dependency rule does this demonstrate? b . If A - > B...

Q:

Describe the AC-3 algorithm for enforcing arc consistency. If you need some support data, here it is: Support Details for the question - [5 marks] (e) Prove that the time complexity of the AC-73...

Q:

provide answers to all questions (a) What are the main criteria to be considered in the design of a line drawing algorithm for a raster graphics display? [2 marks] (b) Describe an algorithm to fill a...

Q:

4 Comparative Programming Languages illustrating your answer by explaining the meaning of the following fragment of code: [self isAwake] whileTrue: [| item | item := self askForCookie. (self...

Q:

class Queue using no other data structures than Item, Boolean, int and Stack. The amortized running time of each Queue meth od must be constant. (Note that you may only use the Stack as a black box:...

Q:

For Questions 1-10, circle the most correct answer for each question. Given the following relation table state for PROJECT, where Pnumber is the primary key and Dnum refers to Dnum in another...

Q:

Suppose a relational schema ( w , x , y , z ) R ( w , x , y , z ) , and set of functional dependencies as follows: : { x - > w , w z - > x y , y - > w x z } F: { x - > w , wz - > xy , y - > wxz }...

Q:

Generate a pulse train with Ton-20us and Toff-10us using 555 timer circuit.

Q:

Suppose that Tucker Industries has annual sales of $5.70 million, cost of goods sold of $2.85 million, average inventories of $1,160,000, and average accounts receivable of $570,000. Assuming that...

Q:

Which of the following is NOT an assumption of the net present value approach? Part 2 A . Investments with the same net present value may have different projected lives and salvage values. B . Future...

Q:

Compared with half a century ago, adoption has become _ _ _ _ _ _ _ _ _ common, but it is more open and acceptabl e , so we probably discuss it _ _ _ _ _ _ _ . fill in the blanks more or much less or...

Q:

Suppose government spending increases. Would the effect on aggregate demand be larger if the Federal Reserve took no action in response or if the Fed were committed to maintaining a fixed interest...

Q:

Suppose that people suddenly wanted to hold more money balances. a. What would be the effect of this change on the economy if the Federal Reserve followed a rule of increasing the money supply by 3...

Q:

Suppose the federal government cuts taxes and increases spending, raising the budget deficit to 12 percent of GDP. If nominal GDP is rising 5 percent per year, are such budget deficits sustainable...