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Premiere Products Exercise Chapter 9 Solution Correct Answers

Chapter 9 exercise answers for Premiere Products database.

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Premiere Products Exercise Chapter 9Solution Correct AnswersForthefollowingexercises,youwillanswerproblemsandquestionsfrommanagementatPremiere Products. You do not use the Premiere Products database for any of these exercises.1.FragmenttheCustomertablesothatcustomersofrep20formafragmentnamedCustomerRep20, customers of rep 35 form a fragment named CustomerRep35, and customers ofrep 65 form a fragment named CustomerRep65. (Include all fields from the Customer table ineach fragment.) In addition, you need to fragment the Orders table so that orders are distributedandstoredwiththecustomersthatplacedtheorders.Forexample,fragmentOrdersRep20consists of those orders placed by customers of rep 20. Write the SQL-type statements to createthese fragments.2. Create a class diagram for the Premiere Products database, as shown in Chapter 1, Figure 1-5. If you need to make any assumptions in preparing the diagram, document those assumptions.3. A user queries the Part table in the Premiere Products database over the company intranet.Assume the Part table contains 5,000 rows, each row is 1,000 bits long, the access delay is 2.5seconds, the transmission rate is 50,000 bits per second, and only 20 of the 5,000 rows in the Parttable satisfy the query conditions. Calculate the total communication time required for this querybased on retrieving all table rows one row at a time, then calculate the total communication timerequired based on retrieving the 20 rows that satisfy the query conditions in a single message.

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