What is a functional dependency? What are the possible sources of the information that defines the functional

Question:

What is a functional dependency? What are the possible sources of the information that defines the functional dependencies that hold among the attributes of a relation schema?

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For book-img-for-question

Fundamentals Of Database Systems

ISBN: 9780133970777

7th Edition

Authors: Ramez Elmasri, Shamkant Navathe

See More Books

Question Posted: Nov 09, 2021 01:16 AM

See More Questions

What are the possible sources of return to an investment in a closed-end fund?
What are the possible sources of stress?
What is a functional decomposition diagram (FDD) and why would you use one? Explain how to create an FDD.
1. A drying process is used to remove 3000 lbm/h of water (vapor) at steady-state from processed paper. The dryer first heats atmospheric air (state 1) at 80F, 1 atm and 60% relative humidity to 250F...
Rick Fox of Corner Brook company at the end of November. Analyze the following transactions by recording their effects in the expanded accounting equation. A. Rick Fox invested $9,000 in the desktop...
Lilly County, faced with the prospect of declining revenues, decides it can save money by doing all printing in- house. The county creates the Lilly Printing Fund (an Internal Service Fund), directs...
Compute the lease payments for the forklift lease of Example 24.1 if the lease is (a) a fair market value lease, (b) a $1.00 out lease, or (c) a fixed price lease that allows the lessee to buy the...
Situation To pump up sales of all brands, Philip Morris is moving aggressively to ship extra cases of cigarettes into distributors warehouses and record them as sales, a practice generally known as...
Suppose we have a nMOSCAP made of Si. Suppose the channel doping is too strong at p = 1019 cm-3. All plots should assume the metal is on the left side. For this problem, we apply Vgs = Vth. (a) Plot...
GGG Electronics builds short-wave radios. Its manufacturing plant is also a warehouse. When parts are received, the receiver compares the type of goods and quantity to a copy of the purchase order...
State the informal guidelines for relation schema design that we discussed. Illustrate how violation of these guidelines may be harmful.
What does the term unnormalized relation refer to? How did the normal forms develop historically from first normal form up to Boyce-Codd normal form?
What are the benefits of reinsurance? Why is it popular in offshore locations such as Bermuda and the Cayman Islands?
There is some economic research that suggests that oil prices play a central role in causing recessions in developed countries. In particular, this research suggests that it is specifically increases...
What was the average restaurant's operating income before these changes? Assuming that the price cut and advertising campaign are successful at increasing volume to the projected level, will the...
Discuss few recent developments with examples that have the potential to disrupt the conventional banking and finance industry.
Six runners are entered in a 100-meter dash for which a gold, silver, and bronze medal will be awarded for first, second, and third place finishes, respectively. In how many possible ways can the...
Why would a personal sickness and accident policy may be more appropriate than an income protection for a self employed electrician? Explain why he may not be able to rely on workers compensation?
DE Solution Spaces Recall that the "general solution" of a DE means a family or set of solution functions (y | y satisfies the DE), where each y is a function on the interval determined by the domain...
What are the risks and liability factors in an audit? What are the implications to the auditor? What are the implications to the organization? How can the auditor mitigate these risks and liability...
Recall that we have two write policies and write allocation policies, and their combinations can be implemented either in L1 or L2 cache. Assume the following choices for L1 and L2 caches: L1...
Media applications that play audio or video files are part of a class of workloads called streaming workloads; i.e., they bring in large amounts of data but do not reuse much of it. Consider a video...
What decimal number does the bit pattern 00C000000 represent if it is a twos complement integer? An unsigned integer?
Consider the following two mutually exclusive projects: Year Cash Flow (A) Cash Flow (B) 01234 -$432,000 40,500 -$43,500 21,100 65,500 12,600 82,500 22,100 547,000 18,900 The required return on these...
Gladstone Company tracks the number of units purchased and sold throughout each accounting period but applies its inventory costing method at the end of each period, as if it uses a periodic...
Carlos Cavalas, the manager of Echo Products' Brazilian Division, is setting the production schedule for the last quarter of the year. The Brazilian Division planned to sell 68,090 units during the...

What is a functional dependency? What are the possible sources of the information that defines the functional

Question:

Step by Step Answer:

A functional dependency FD is a relationship between two attributes typically between the PK and oth...View the full answer

Fundamentals Of Database Systems

Students also viewed these Computer science questions