Question: This exercise asks you to converting business statements into dependencies. Consider the following relation DiskDrive(serialNumber, manufacturer, model, batch, capacity, retailer). Each tuple in the relation

This exercise asks you to converting business statements into dependencies. Consider the following relation DiskDrive(serialNumber, manufacturer, model, batch, capacity, retailer). Each tuple in the relation DiskDrive contains information about a disk drive with a unique serialNumber, made by a manufacturer, with a particular model, released in a certain batch, which has a certain storage capacity, and is sold by a certain retailer. For example, the tuple DiskDrive(1978619, WesternDigital, A2235X, 765234, 500, CompUSA) specifies that WesternDigital made a disk drive with serial number 1978619, model number A2235X in batch 765235 with 500GB that is sold by CompUSA.
Write each of the following dependencies as an FD:
a. The manufacturer and serial number uniquely identifies the drive
b. A model number is registered by a manufacturer and hence can't be used by another manufacturer.
c. All disk drives in a particular batch are the same model.
d. All disk drives of a particular model of a particular manufacturer have exactly the same capacity.

Step by Step Solution

★★★★★

3.48 Rating (164 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

a Manufacturer serialNumber model batch capacity retaile... 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)

888-CS-DB (2348).docx

120 KBs Word File

Students Have Also Explored These Related Databases Questions!

Database design often involves decisions about the storage of attributes. For example a Social Security Number can be stored as a one attribute or split into three attributes (one for each of the...

Equation (14.1) on page 513 defines the joint distribution represented by a Bayesian network in terms of the parameters Î¸(X i |Parents(X i )). This exercise asks you to derive the...

Wally Los Gatos, owner of Wally's Wonderful World of Wallcoverings, Etc., has hired you as a consultant to design a database management system for his new online marketplace for wallpaper, draperies,...

4. This exercise asks you to convert business statements into dependencies Consider the relation DISK_DRIVE (Serial_number, Manufacturer, Model, Batch, Capacity, Retailer). Each tuple in the relation...

This exercise asks you to convert business statements into dependencies. Consider the relation DISK_DRIVE (Serial_number, Manufacturer, Model, Batch, Capacity Retailer). Each tuple in the relation...

Consider the relation DISK _ DRIVE ( Serial _ number, Manufacturer, Model, Batch, Capacity, Retailer ) . Each tuple in the relation DISK _ DRIVE contains information about a disk drive with a unique...

Task 3 ( 3 . 0 marks ) Analysis of business statements and normalization Each manufacturer manufactures many disk - drives, and the manufacturer assigns each disk - drive a serial number. The serial...

1. Consider the relation DiskDrive(SerialNum,Manufacturer,Model,Batch,Capacity,Retailer). Each tuple in the relation contains information about a disk drive with a unique serial number, made by a...

MATLAB ASSIGN 1- Follow Directions and Complete. Will Thumbs Up! Directions: Unless otherwise specified, your write-up should contain the MATLAB input commands, the corresponding output, and the...

Emergency landing a plane leaves the airport in Galis-teo and flies 170 Ian at 68 east of north and then changes direction to fly 230 Ian at 48 south of east, after which it makes an immediate...

Reconsider the law firm of Exercise 5.1. Assume the prevailing revenues per shopping and medical projects are $ 4000 and $ 5000 per project, respectively, and that out of pocket expenses associated...

A market where securities trade after issuance by the firm is called a a . primary market. b . secondary market. c . money market. d . syndicate.

A submarine has three navigational devices but can remain at sea if at least two are working. Suppose that the failure times are exponential with means 1 year, 1.5 years, and 3 years. Formulate a...

Define the following terms: indexing field, primary key field, clustering field, secondary key field, block anchor, dense index, and nondense (sparse) index.

Write program code to access individual fields of records under each of the following circumstances. For each case, state the assumptions you make concerning pointers, separator characters, and so...

Write pseudocode for the insertion algorithms for linear hashing and for extendible hashing.

Martin Development Co. is deciding whether to proceed with Project X. The cost would be $10 million in Year 0. There is a 50% chance that X would be hugely successful and would generate annual...

On January 1, 2020, a machine costing $210,000 with a four-year life and an estimated $18,000 salvage value is installed in Apple Company's factory to Required: Compute depreciation for each year and...

Matt is analyzing two mutually exclusive projects of similar size and has prepared the following data. Both projects have 5 year lives. Matt has been asked for his best recommendation given this...