Question: Consider the universal relation schema INVENTORY (Store#, Item, Vendor, Date, Cost, Units, Manager, Price, Sale, Size, Color, Location) and the constraint set F {fd1, fd2,

Consider the universal relation schema INVENTORY (Store#, Item, Vendor, Date, Cost, Units, Manager, Price, Sale, Size, Color, Location) and the constraint set F {fd1, fd2, fd3, fd4, fd5, fd6, fd7} where:

a. Do the functional dependencies shown constitute a minimal cover of F? If not, do they derive a minimal cover?
b. Derive the candidate key(s) of URS using the synthesis approach.
c. Derive the candidate key(s) of URS by using the decomposition approach.

f31: {item. Vendor) fd2: {Store#, Date) (Manager, Sale) fd4: Manager-> Store# fd6: Item (Size, Color) Cost fd3: (Store#, Item, Date) fas: Cost Price Units fd7: Vendor Location

Step by Step Solution

★★★★★

3.34 Rating (160 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

a The algorithm to compute the minimal cover for a given set of functional dependencies F is a Set G to F b Convert all FDs in G to standard canonical formie the right side dependent attribute of ever... 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

Document Format (1 attachment)

887-CS-DB (2171).docx

120 KBs Word File

Students Have Also Explored These Related Databases Questions!

Consider the universal relation schema STOCK (Symbol, Company, Exchange, Investor, Date, Price, Broker, Dividend) and the following dependencies set: fd: Symbol {Company, Exchange, Dividend} mvd:...

Consider the universal relation R = {A, B, C, D, E, F, G, H, I} and the set of functional dependencies F = { {A, B} -> {C}, {A} -> {D, E}, {B} -> {F}, {F} -> {G, H}, {D} -> {I, J} }. What is the key...

Given the Universal Relation Schema URS (A, B, C, D, F, G) and the set of FDs prevailing over URS F {fd1, fd2, fd3, fd4, fd5, fd6}, where: a. Derive a canonical cover of F. b. Derive all the...

Consider the universal relation schema INVENTORY (Store#, Item, Vendor, Date, Cost, Units, Manager, Price, Sale, Size, Color, Location) and the constraint set F {fd1, fd2, fd3, fd4, fd5, fd6, fd7}...

For the following excerpt from an ERD, specify the logical ( relational ) schema as per the foreign key design in the following ways: a . using directed arcs Consider the universal relation schema...

Question 5 7 Please use the following \ ( F \ ) to answer questions 5 7 - 5 8 : Consider the universal relation chema INVENTORY ( Store \ # , Item, Vendor, Date, Cost, Units, Manager, Price, Sale,...

13. Consider the universal relation schema INVENTORY (Store\#, Item, Vendor, Date, Cost, Units, Manager, Price, Sale, Size, Color, Location) and the constraint set F{fd1,fd2,fd3,fd4,fd5,fd6,fd7}...

Exercise 2: Implement calculate_S and calculate_R Recall that the element-wise squared Euclidean distance matrix D O DE Rnxm is defined by [D D] = (x; zj) (x; Zj) - - Also, the matrices S, RE Rnxm...

A slitter for sheet sandpaper owned by Abbotsford Abrasives (AA) requires regular maintenance costing $7500 per year. Every five years it is over- hauled at a cost of $25 000. The original capital...

Find the range and standard deviation of the set of data. 17, 25,27,15,21 Required: The range is____ Standard deviation___

4 . Prepare an income statement ( including earnings per share ) , statement of stockholders equity, and balance sheet. Show all images Show all images Show all images done loading

Construct a dot plot from the following data. 16 15 17 15 15 15 14 9 16 15 13 10 8 18 20 17 17 17 18 23 7 15 20 10 14

Consider a failure that occurs during 2PC for a transaction. For each possible failure that you listed in Exercise 19.6a, explain how 2PC ensures transaction atomicity despite the failure.

Consider a distributed system with two sites, A and B. Can site A distinguish among the following? B goes down. The link between A and B goes down. B is extremely overloaded and response time is...

The persistent messaging scheme described in this chapter depends on timestamps combined with discarding of received messages if they are too old. Suggest an alternative scheme based on sequence...

Example 15: Draw a flowchart to receive a positive whole number and determine how many of its digits in odd positions are 7. For instance, if the input is 6475672, the output should be 1 because...

When using derivative for speculation and hedging, which of the following is FALSE? In the case of options contract, traders buy call option on the underlying asset when the trader's expected price...

11. (20 points) Walt exchanges land held for investment for an office building owned and used by Skyler in her business. The fair market value of Walt's land is $225,000 and his adjusted basis in the...