Question: dependencies Given the schema R(A,B,C,D,E) with the following set F of functional E AC AB - BE AC CD BE BC C E D

dependencies Given the schema R(A,B,C,D,E) with the following set F of functional E AC AB - BE AC CD BE BC

dependencies Given the schema R(A,B,C,D,E) with the following set F of functional E AC AB - BE AC CD BE BC C E D C Perform the following tasks: a) (10 pts.) Compute the closure of the set of attributes (BE) step by step by explaining the reason why each attribute belongs in that closure. b) (10 pts.) Find a superkey for R different from (A.B.C.D.E} and prove that it is a superkey.

Step by Step Solution

★★★★★

3.47 Rating (157 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

Given SchemaRABCDE with F of Functional Dependencies EAC ABBE ACCD BEBCC CE DC Task A Compu... View full answer

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!

Country A and country B are two neighboring countries. The inverse supply and demand functions for electricity (TWh) in these two countries are given by: Sa = 7,5+0.15Xa Da = 21 -0.075Xa Sb =...

Consider the following information for an unlevered firm U EBIT = $1,600 annually Unlevered value Vu= $4,000 Tax rate = 34% Cost of Debt = 10% A levered firm L in the same business risk class has a...

Joe borrowed $7,109.00 to buy a car. If interest was charged on the loan at 9.37% p.a., how much interest would Joe have to pay in 240 days?

Consider the schema R = (A, B, C, D, E, G) and the set F of functional dependencies: AB CD B D DE B DEG AB AC DE R is not in BCNF for many reasons, one of which arises from the functional dependency...

Consider the schema R = ( A , B , C , D , E , G ) and the set F of functional depen - dencies: A - > BC BD - > E CD - > AB a . Find a nontrivial functional dependency containing no extraneous at -...

6. [20 points] Consider a relational schema R (A, B, C, D, E, F) where the set F of functional dependencies holds on R and F= {AB, C A, CD E, D F). (a) Identify all candidate key(s) of R. (b)...

Given R (A, B, C, D, E, F) and the following set of functional dependencies: G = {A->B, B->A, AB->CDEF, B->C, D->E, EF->D} give the minimal cover of R List all candidate keys Give a BCNF...

Consider a relation scheme R = (A, B, C, D, E, H) on which the following 1 functional dependencies hold: {A->B, BC-> D, E->C, D->A}. Write the Apply 5 candidate keys of R? Consider the following...

1. (6 pts) Consider the following instance 4 (1) Does the functional dependency D->C hold in this instance? (2) Does the functional dependency C->B hold in this instance? (3) Does the functional...

Solve please Consider a relation scheme R = (A, B, C, D, E, H) on which the following 1 functional dependencies hold: {A->B, BC-> D, E->C, D->A}. Write the Apply 5 candidate keys of R? Consider the...

Was Airbornes strategy of trying to diversify its product offering to include logistic services for clients wisely? Read the case study Airborne Express: Underdog and answer the question:

Derosa Company has a defined benefit pension plan for its employees. Prior to 2007 the company has not had an additional pension liability. At the end of 2007 the companys actuary developed the...

Find the derivative of the given expression. y = l n ( ( 2 2 x 2 2 2 x 1 4 x 1 8 x 2 ) 2 )

An activity you do in daily live in which you can draw analogies with some auditing concepts (i.e. NZ drivers need to abide in road codes when driving to minimise car accidents. The road codes are...

Air Australia is considering beginning a route from Brisbane to New York: This will require the purchase of a new Airbus A350 Long Range aircraft that will cost $350 Million. The aircraft will have...

After reading the prior problem and looking at your accounting for the lease contract with Company B, Company A decides that the FINANCE LEASE format under the new lease accounting rules does not...

According to the law, professionals and experts are held to a higher standard of care In other words, the courts will hold a professional to the standard of a reasonable professional in their field...

Determine the related parties, related party transactions and the reporting company in the above case. Explain how the related party transactions above affect shareholders interest. Discuss how the...

Which compromise counted African Americans as population but at a different rate than the white population?Great Compromise3/5 Compromise2/3 CompromiseGrand Compromise

Mark each of the following true or false. ___ a. Every boundary is a cycle. ___ b. Every cycle is a boundary. ___ c. C n (X) is always a free abelian group. ___ d. B n (X) is always a free abelian...

A rectangular prism 2ft long with 1-ft square ends is to have each of its six faces painted with one of six possible colors. How many distinguishable painted prisms are possible if a. No color is to...

Determine whether the binary operation * gives a group structure on the given set. If no group results, give the first axiom in the order G 1 , G 2 , G 3 from Definition 4.1 that does not hold. Let*...

=+53. Arsenic is a known carcinogen and poison. The standard laboratory procedures for measuring arsenic concentration (g/L) in water are expensive. Consider the accompanying summary data and Minitab...

=+27.0 25.5 28.5 34.0 31.0 34.5 32.5 a. Is it plausible that this sample was selected from a normal population distribution?

=+b. Estimate true average modulus of elasticity for these mixtures in a way that conveys information about precision and reliability.