Question: Examine the two applications shown in Figures

> Fitchwood Insurance Company, which is involved primarily in the sale of annuity products, would like to design a data mart for its sales and marketing organization. Presently, the OLTP system is a legacy system residing on a shared network drive consisti

> Pine Valley Furniture wants you to help design a data mart for analysis of sales. The subjects of the data mart are as follows: Salesperson: Attributes: SalespersonID, Years with PVFC, SalespersonName, and SupervisorRating. Product: Attributes: ProductID

> A firm wants to reduce fluid drilling costs substantially by increasing drilling fluid efficiency. Research finds that both fluid drilling speed and cost are significantly influenced by Time, Geography, Drilling fluid type, Formation, and Well type. Geog

> A pharmaceutical retail store manages its current sales, procurement and materials availability at the store through Excel sheets. Owing to the increase in the number of branches in the city, the store manager is now finding this process of data maintena

> A university gathers student admission data from three different sources: through forms filled manually at university desks, by registering at the university Web site, or by registering on the department’s Web site. All the three sources have disparate f

> Employees working in IT organizations are assigned different projects for a specific duration, such as a few months or years. The duration is specified by the project start date and end date in the database. The project location is different for each pro

> Table 1-1 shows example metadata for a set of data items. Identify three other columns for these data (i.e., three other metadata characteristics for the listed attributes) and complete the entries of the table in Table 1-1 for these three additional col

> Simplified Automobile Insurance Company would like to add a Claims dimension to its star schema. Attributes of Claim are ClaimID, ClaimDescription, and ClaimType. Attributes of the fact table are now PolicyPremium, Deductible, and MonthlyClaimTotal. a. E

> You are to construct a star schema for Simplified Automobile Insurance Company (for a more realistic example, Kimball, 1996b). The relevant dimensions, dimension attributes, and dimension sizes are as follows: InsuredParty: Attributes: InsuredPartyID and

> A table Student stores the values StudentID, name, date of result, and total marks obtained. A student’s information is: StudentID: S876, Name: Sabcd, Date of result: 22/12/14, and Total marks obtained: 650. An update transaction has changed the date and

> Drilling often accounts for one-third to two-thirds of the total cost in the search for fluid. Advances in drilling technology can reduce these costs substantially. The key point is redesigning the scheme of drilling fluid. A research study identifies th

> The following table shows some simple album and price data as of the date 07/18/2015: The following transactions occur on 07/19/2015: • Album K3 price discounted to $7. • Album K5 is deleted from the file. â&#128

> Examine the three tables with student data shown in Figure 9-1. Design a single-table format that will hold all of the data (non-redundantly) that are contained in these three tables. Choose column names that you believe are most appropriate for these da

> Based on the table above as well as additional research, write a memo in support of or against the following statement: “Cloud databases will increasingly eliminate the need for data/database administrators in corporations.”

> Assume that a bank operates multinational and has millions of financial records of customers in its database. The bank also offers e-banking services to its clients. Based on what you have learned from the book, suggest how they can take regular backups

> Revisit the six issues identified in Problem and Exercise 8-72. What risk, if any, do each of them pose to the firm? Data from Problem and Exercise 8-72: During the Sarbanes-Oxley audit of a financial services company, you note the following issues. Cat

> During the Sarbanes-Oxley audit of a financial services company, you note the following issues. Categorize each of them into the area to which they belong: IT change management, logical access to data, and IT operations. a. Five DBAs have access to the S

> You are the manager of a department in a small logistics company. The current database system being used is hierarchical, and you have been tasked to formulate a team that can create a plan to develop a more efficient database system that is consistent w

> A number of situations have been listed below. For each one, identify the need, if any, to create an index. Justify your answer. If there is indeed a need, suggest a way for the index to be created. a. Banking applications that involve frequent retrieval

> For each of the situations described, decide which technique for data field design listed below would be most appropriate and how it could be applied. • Code lookup table • Default value • Range control • Referential integrity • Handling missing data a

> Fill in the two authorization tables for Pine Valley Furniture Company below based on the following assumptions (enter Y for yes or N for no): • Salespersons, managers, and carpenters may read inventory records but may not perform any o

> Refer to Figure 4-5. For each of the following reports (with sample data), indicate any indexes that you feel would help the report run faster as well as the type of index: a. State, by products (user-specified period) State, by Products Report, January

> Consider the EER diagram for Pine Valley Furniture shown in Figure 3-12. Figure 8-15 looks at a portion of that EER diagram. Let’s make a few assumptions about the average usage of the system: • There are 60,000 custom

> Consider the composite usage map in Figure 8-1. After a period of time, the assumptions for this usage map have changed, as follows: • There is an average of 60 supplies (rather than 40) for each supplier. • Manufactur

> Create an index on the CustomerID column of the Customer_T and Order_T table in Figure 4-4. Data from Figure 4-4:

> Consider the following assumptions: • A music company offers three types of music genres: Jazz, Hip-hop, and Metal (subtypes of the Genre supertype). An “Artist” instances “Records” of these Genres. • There are total of 8,000 songs in company’s database,

> Parallel query processing, as described in this chapter, means that the same query is run on multiple processors and that each processor accesses in parallel a different subset of the database. Another form of parallel query processing, not discussed in

> Suggest an application for each type of file organization. Explain your answer.

> Visit the PHP website (php.net) and investigate how a failure to sanitize database inputs can leave a database exposed to online attack.

> Assume that the most important reports that the organization needs are as follows: • A list of the current developer’s project assignments. • A list of the total costs for all projects. • For each team, a list of its membership history. • For each countr

> Consider Figure 4-35 and your answer to Problem and Exercise 4-44 in Chapter 4. Assume that it is essential that customers who had rented from Vacation Property Rentals earlier can be identified quickly based on their last name–first na

> Specify the format for the Oracle date data type. How does it account for change in century? What is the purpose of ‘TIMESTAMP WITH LOCAL TIMEZONE’? Suppose the system time zone in database in City A = –9:00 and City B = –4:00. A client in City B inserts

> Consider the relations specified in Problem and Exercise 8-53. Assume that the database has been implemented without denormalization. Further assume that the database is global in scope and covers thousands of leagues, tens of thousands of teams, and hun

> Assume that the table BOOKS in a database with the primary key on BookID has more than 25,000 records. A query is frequently executed in which the Publisher of the book appears in the WHERE clause. The Publisher field has more than 100 different values,

> A company offering music services provides a search feature to its users and allows them to mix music (a key feature for disc jockeys), which is supported through parallel processing. All music information is stored in a database management system. a. Wh

> Search the Internet for at least three examples where parallel processing is applied. How was the underlying database prepared for this? What were the advantages of this implementation?

> Use the Internet to search for examples of each type of horizontal partitioning provided by Oracle. Explain your answer.

> Consider the following normalized relations for a sports league: TEAM(TeamID, TeamName, TeamLocation, TeamManager) PLAYER(PlayerID, PlayerFirstName, PlayerLastName, PlayerDateOfBirth, PlayerSpecialtyCode) SPECIALTY(SpecialtyCode, SpecialtyDescription, Sa

> Consider the relations in Problem and Exercise 8-51. Identify possible opportunities for denormalizing these relations as part of the physical design of the database. Which ones would you be most likely to implement? Data from Problem and Exercise 8-51:

> On a smaller scale than in Field Exercise 7-25, investigate the computing architecture of a department within your university. Try to find out how well the current system is meeting the department’s information-processing needs. Data from Exercise 7-25:

> Consider the following set of normalized relations from a database used by a mobile service provide to keep track of its users and advertiser customers. USER(UserID, UserLName, UserFName, UserEmail, UserYearOfBirth, UserCategoryID, UserZip) ADVERTISERCLI

> Consider the following normalized relations from a database in a large retail chain: STORE (StoreID, Region, ManagerID, SquareFeet) EMPLOYEE (EmployeeID, WhereWork, EmployeeName, EmployeeAddress) DEPARTMENT (DepartmentID, ManagerID, SalesGoal) SCHEDULE (

> When students fill out forms for admission to various courses or to write their exams, they leave many missing values. This may lead to issues while compiling data. Can this be handled at the data capture stage? What are the alternate approaches to handl

> In a normalized database, all customer information is stored in a Customer table, invoices are stored in an Invoice table, and related account manager information in an Employee table. Suppose a customer changes their address and then demands old invoice

> Say that you are interested in storing the numeric value 3,456,349.2334. What will be stored with each of the following Oracle data types? a. NUMBER(11) b. NUMBER(11,1) c. NUMBER(11,-2) d. NUMBER(11,6) e. NUMBER(6) f. NUMBER

> Explain in your own words what the precision (p) and scale (s) parameters for the Oracle data type NUMBER mean.

> Choose Oracle data types for the attributes in the normalized relations that you created in Problem and Exercise 4-47 in Chapter 4. Data from Problem and Exercise 4-47: Figure includes an EER diagram describing a publisher specializing in large edited w

> Choose Oracle data types for the attributes in the normalized relations in the middle panel of Figure 8-4.

> Consider the following two relations for a firm: EMPLOYEE(EmployeeID, EmployeeName, Contact, Email) PERFORMANCE(EmployeeID, DepartmentID, Rank) The following is a typical query against these relations SELECT Employee_T.EmployeeID, EmployeeName, Departmen

> Investigate the computing architecture of your university. Trace the history of computing at your university and determine what path the university followed to get to its present configurations. Some universities started early with mainframe environments

> List and discuss five areas where threats to data security may occur.

> Conduct some research to find out how a Java-based application can be connected to a database. Provide some brief code snippets and annotate the code.

> How does versioning work in a current database environment? What advantages does versioning offer?

> What is the difference between shared locks and exclusive locks?

> What is the advantage of optimistic concurrency control compared with pessimistic concurrency control?

> Visit an online retailer such as Amazon or eBay and explain the system’s design using the MVC paradigm.

> For each product, display in ascending order, by product ID, the product ID and description, along with the customer ID and name for the customer who has bought the most of that product; also show the total quantity ordered by that customer (who has boug

> The head of marketing is interested in some opportunities for cross-selling of products. She thinks that the way to identify cross-selling opportunities is to know for each product how many other products are sold to the same customer on the same order (

> Display employee information for all the employees in each state who were hired before the most recently hired person in that state.

> Display in product ID order the product ID and total amount ordered of that product by the customer who has bought the most of that product; use a derived table in a FROM clause to answer this query.

> For each of the descriptions below, perform the following tasks: i. Identify the degree and cardinalities of each relationship. ii. Express the relationships in each description graphically with an E-R diagram. a. A book is identified by its ISBN number,

> Write an SQL query to list the salesperson who has sold the most computer desks.

> Write an SQL query to list the order number, product ID, and ordered quantity for all ordered products for which the ordered quantity is greater than the average ordered quantity for that product.

> List the IDs and names of those sales territories that have at least 50 percent more customers as the average number of customers per territory.

> List the IDs and names of all products that cost less than the average product price in their product line.

> Review the first query in the “Correlated Subqueries” section. Can you identify a special set of standard prices for which this query will not yield the desired result? How might you rewrite the query to handle this situation?

> Write an SQL query that lists the vendor ID, vendor name, material ID, material name, and supply unit prices for all those materials that are provided by more than one vendor.

> Display the customer names of all customers who have ordered (on the same or different orders) both products with IDs 3 and 4.

> Show the customer ID and name for all the customers who have ordered both products with IDs 3 and 4 on the same order.

> Display the customer ID, name, and order ID for all customer orders. For those customers who do not have any orders, include them in the display once by showing order ID 0.

> Rewrite your answer to Problem and Exercise 6-71 for each customer, not just customer 16. Data from Problem and Exercise 6-71: Display the name of customer 16 and the names of all the customers that are in the same zip code as customer 16.

> A cellular operator needs a database to keep track of its customers, their subscription plans, and the handsets (mobile phones) that they are using. The E-R diagram in Figure 2-24 illustrates the key entities of interest to the operator and the relations

> Display the name of customer 16 and the names of all the customers that are in the same zip code as customer 16.

> Display the EmployeeID and EmployeeName for those employees who do not possess the skill Router. Display the results in order by EmployeeName. Show how you constructed this query using a Venn or other type of diagram.

> Display the customer ID, name, and order ID for all customer orders. For those customers who do not have any orders, include them in the display once.

> Write an SQL query to produce a list of all the products (i.e., product description) and the number of times each product has been ordered. Show how you constructed this query using a Venn or other type of diagram.

> Display the names of the states in which customers reside but for which there is no salesperson residing in that state. There are several ways to write this query. Try to write it without any WHERE clause. Write this query two ways, using the set command

> Display the order IDs for customers who have not made any payment, yet, on that order. Use the set command UNION, INTERSECT, or MINUS in your query.

> The production manager at PVFC is concerned about support for purchased parts in products owned by customers. A simple analysis he wants done is to determine for each customer how many vendors are in the same state as that customer. Develop a list of all

> Write a query to list the number of products produced in each work center (label as TotalProducts). If a work center does not produce any products, display the result with a total of 0.

> Display the salesperson name, product finish, and total quantity sold (label as TotSales) for each finish by each salesperson.

> List, in alphabetical order, the names of all employees (managers) who are now managing people with skill ID BS12; list each manager’s name only once, even if that manager manages several people with this skill.

> Refer to the EER diagram for patients in Figure 3-3. Make any assumptions you believe are necessary. Develop sample definitions for each entity type, attribute, and relationship in the diagram. Data from Figure 3-3:

> Modify Problem and Exercise 6-60 so that the list includes the number of products each customer bought in each product line in March 2018. Data from Problem and Exercise 6-60: Modify Problem and Exercise 6-59 so that you include the number of products i

> Modify Problem and Exercise 6-59 so that you include the number of products in product line Basic that the customer ordered in March 2018. Data from Problem and Exercise 6-59: Write an SQL query to list each customer who bought at least one product that

> Write an SQL query to list each customer who bought at least one product that belongs to product line Basic in March 2018. List each customer only once.

> Write an SQL query to list each customer who has bought computer desks and the number of units sold to each customer. Show how you constructed this query using a Venn or other type of diagram.

> For every order that has been received, display the order ID, the total dollar amount owed on that order (you’ll have to calculate this total from attributes in one or more tables; label this result TotalDue), and the amount received in payments on that

> Calculate the total raw material cost (label TotCost) for each product compared to its standard product price. Display product ID, product description, standard price, and the total cost in the result.

> Write an SQL query that lists for each vendor (including vendor ID and vendor name) those materials that the vendor supplies where the supply unit prices is at least four times the material standard price.

> Write an SQL query to total the cost of order number 1.

> Write an SQL query that lists those work centers that employ at least one person who has the skill ‘QC1’.

> Write an SQL query to display the total number of employees working at each work center (include ID and location for each work center).

> Refer to the employee EER diagram in Figure 3-2. Make any assumptions that you believe are necessary. Develop a sample definition for each entity type, attribute, and relationship in the diagram. Data from Figure 3-2:

> Write an SQL query to display each item ordered for order number 1, its standard price, and the total price for each item ordered.

> Write an SQL query to display the order number, customer number, order date, and items ordered for some particular customer.

> List the name of each employee, his or her birth date, the name of his or her manager, and the manager’s birth date for those employees who were born before their manager was born; label the manager’s data Manager and ManagerBirth. Show how you construct

> List the names and number of employees supervised (label this value HeadCount) for each supervisor who supervises more than two employees.

> Modify P&E 6-46 to include only those product lines the average price of which is higher than $200. Data from P&E 6-46: Write an SQL query to list all product line names and, for each product line, the number of products and the average product price. M

> Write an SQL query to list all product line names and, for each product line, the number of products and the average product price. Make sure to include all product lines separately.