Let R(A,B,C) be a relation schema, and let R 1 (A,B) and R 2 (A,C) be a

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

Question:

Let R(A,B,C) be a relation schema, and let R₁(A,B) and R₂(A,C) be a decomposition of R.

1) Determine a set F of non-trivial functional dependencies for R such that the decomposition of R in R₁ and R₂ is lossy and dependency-perserving. Explain why your selection of F is dependency-perserving.

2) Explain why your selection of F in the previous question is not a lossless decomposition.

Related Book For answer-question

Fundamentals Of Database Systems

ISBN: 9780133970777

7th Edition

Authors: Ramez Elmasri, Shamkant Navathe

See More Books

Posted Date: Mar 27, 2024 05:57 AM

See More Questions

Portray in words what transforms you would have to make to your execution to some degree (a) to accomplish this and remark on the benefits and detriments of this thought.You are approached to compose...
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:...
Prolog You are approached to compose a Prolog program to work with twofold trees. Your code shouldn't depend on any library predicates and you ought to expect that the mediator is running without...
A square garden has an area of 900 square feet. If a sprinkler (with a circular pattern) is placed in the center of the garden, what is the minimum radius of spray the sprinkler would need in order...
An auditorium has organ pipes at the front and at the rear of the hall. Two identical pipes, one at the front and one at the back, have fundamental frequencies of 264.0 Hz at 20.0C. During a...
Fill in each blank so that the resulting statement is true. The y-coordinate of a point where a graph crosses the y-axis is called a/an________ . The x-coordinate of such a point is always________ .
Consider the following cash flow profile, and assume MARR is 10 percent/year and the finance rate is 4 percent/year. a. Determine the MIRR for this project. b. Is this project economically...
a. Using the AIRPORT KLX Table, describe an example that illustrates the insertion anomaly. b. Using the AIRPORT KLX Table, describe an example that illustrates the deletion anomaly. c. Using the...
K 1 A waffle recipe that serves 7 calls for 1 cups of flour. How many cups of flour will be needed if the chef must serve 28 people? 10- The chef needs cups of flour. (Type an integer or a simplified...
Current Attempt in Progress Ivanhoe Wyatt is unable to reconcile the bank balance at January 31. Ivanhoe's reconciliation is as follows. Cash balance per bank Add: NSF cheque Less: Bank service...
What factors contribute to the resilience of stereotypes, rendering them challenging to dismantle or overcome within societal perceptions and interactions?
1.1. Estimate the average annual daily demand design flow (ML/day) for a water supply scheme servicing a new development area close to Boksburg, in Gauteng Province. The following data have been used...
Both the Springfield public schools and the Shelbyville public schools are fully financed by local taxes of 1% on all property. In Shelbyville, the average house is worth $150,000 while houses in...
In what ways does the prevailing ideology exert its influence on the formulation and implementation of public policy? Please provide detailed instances to exemplify this phenomenon, drawing upon...
You are given the following data for a set of coupon bonds with different maturity dates in the table below. Also assume the current interest rate (YTM) is 10%, the Face Value of each bond is $1000,...
Answer the following question: How are therapies used?
The liquidliquid extractor in Figure 8.1 operates at 100F and a nominal pressure of 15 psia. For the feed and solvent flows shown, determine the number of equilibrium stages to extract 99.5% of the...
Why has subordinate legislation come to prominence?
What are the advantages of a settlement over a court trial?
Define appellant ; respondent ; counterclaim ; counsel ; bench ; writ ; settlement ; pleadings ; party and party costs ; res judicata .

Let R(A,B,C) be a relation schema, and let R 1 (A,B) and R 2 (A,C) be a

Question:

Expert Answer:

Fundamentals Of Database Systems

Students also viewed these databases questions