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computer science
modern database management 13th edition

Questions and Answers of Modern Database Management 13th Edition

Visit an online retailer such as Amazon or eBay and explain the system’s design using the MVC paradigm.
What is the advantage of optimistic concurrency control compared with pessimistic concurrency control?
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
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
Visit the PHP website (php.net) and investigate how a failure to sanitize database inputs can leave a database exposed to online attack.
Outline the steps you would take to conduct a risk assessment for your place of employment with regard to attaching a database to your public site. If possible, help with the actual implementation of
Determine what you would have to do to use Python or JSP on a public Web site owned either by you or by the organization for which you work.
Make an appointment to interview your school, college, or university database administrator. Find out the most common forms attacks perpetuated internally and outside the organization. Compare these
According to your own personal interests, use one of the common combinations PHP/Python and MySQL or JSP and Oracle to attach a database to your personal Web site. Test it locally and then move it to
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.
Conduct a Web search on security issues relating to poorly designed SQL. Identify the most common ones and suggest what measures can be taken to address them.
Compare two versions of SQL to which you have access, such as Microsoft Access and Oracle. Identify at least five similarities and three dissimilarities in the SQL code from these two SQL systems. Do
Write and execute queries for the various reports and displays you identified as being required by the various stakeholders. Make sure you use both subqueries and joins. Your instructor may specify
Create your proof of concept using your technological recommendations (or using the environment that your instructor asks you to use).
Create a testing strategy (including user acceptance testing) for your proof of concept. Which stakeholders should you involve in the phase? Who do you think should sign off on the testing phase
Create a deployment/rollout strategy for your system within FAME. Ensure that your deployment strategy includes a plan for training, conversion/loading of existing data into the new system, and
List four reasons why an instance of a relational schema should be created with sample data.
Briefly outline the seven steps of transforming an EER diagram into the associated relations.
What is a schema? Discuss two common methods of expressing a schema.
List the three components of a relational data model.
Discuss why the E-R model is a popular modeling tool.
What differentiates data lakes from traditional data warehouses?
For each of the following pairs of related entities, indicate whether (under typical circumstances) there is a one-to many or a many-to-many relationship. Then, using the shorthand notation
Talk with a database administrator or designer from the organization. What type of metadata does this organization maintain about its databases? Why did the organization choose to keep track of these
You are the manager of a department in a small logistics company. The current database system being used is hi rarchical, and you have been tasked to formulate a team that can create a plan to
Determine the company’s use of intranet, extranet, or other Web-enabled business processes. For each type of process, determine its purpose and the database management system that is being used in
Consider a major database in this organization, such as one supporting customer interactions accounting, or manufacturing. What is the architecture for this database? Is the organization using some
In the section “Disadvantages of File Processing Systems,” the statement is made that the disadvantages of file processing systems can also be limitations of databases, depending on how an
What problems may be encountered when developing new programs without designing a database management system?
Contrast transactional and analytical data management approaches.
Think of an organizational database in which some of the fields in the CUSTOMER table must have the following data types. Explain they mean and they are used.a. Customer ID (auto-numeric field)b.
Consider a book rental system in a comic store. When a customer borrows or returns a comic book, the shopkeeper needs to note down the transaction or update the corresponding record on the
Interview one person from a key business function, such as finance, human resources, or marketing. Concentrate your questions on the following items: How does he or she retrieve data needed to make
Consider Figure 1-5. What are the two common methods by which users interact with data in a database? Which Sone is more convenient to users if they do not have an understanding of query language?
Using a table, differentiate between how data is represented in a file processing environment and how it is represented in a relational database.
Review the example in Figure 1-2 and 1-4 regarding the differences between the file-based approach and the current database approach. Explain how these differences would impact the relationships
List three additional entities that might appear in an enterprise data model for Pine Valley Furniture Company.
Consider the following statement and translate it into SQL: Show me the “First Name,” “Last Name,” and “Company Name” fields from the “Contacts” table where the “City” field
A database is referred to as “an organized collection of logically related data.” What does “related data” mean? Why must data be related?
Consider Figure 1-15. While designing the attributes for the Customer table, is it necessary to designate an attribute, such as Customer ID, as a key field? Can we use an ordinary attribute, such as
Figure 1-5 specifies categories for Operational and Informational data management systems. Describe the main difference between these two categories
There are various development approaches in organizations, and the traditional ones have now been complemented by the more innovative system development methods. Much has been said about the
Based on Figure 1-5, what are the four perspectives from which you will explore transactional systems in this book?What are the main competencies associated with each of these perspectives?Figure 1-5
What is the purpose of designing an enterprise data model? How is it different from the design of a particular database?
A relationship is established between any pair of entities in an enterprise data model. Explain why a relationship is necessary.
Prototyping is an iterative process of system development in which requirements are converted into a working system that is continually revised by analysts and users. What are the circumstances under
Specify the difference between database solutions supporting enterprise databases and departmental multitiered databases.
Consider the SQL example in Figure 1-19.Figure 1-19Figure 1.20a. What is the name of the table that is referred to when the SELECT statement is executed?b. How many tables are accessed when the FROM
Consider Figure 1-15. Explain the meaning of the line that connects CUSTOMER to ORDER and the line that connects ORDER to INVOICE. What does this say about how Pine Valley Furniture Company does
Consider the project data model shown in Figure 1-16.a. Create a textual description of the diagrammatic representation shown in the figure. Ensure that the description captures the rules/constraints
Answer the following questions concerning Figures 1-18 and 1-19:Figures 1-18Figures 1-19a. What will be the field size for the Product Line Name field in the Product table? Why?b. In Figure 1-19, how
How does the use of an agile methodology affect decisions regarding data management?
Explain why certain business environments favor specific database development methodologies. Highlight the pros and cons of each methodology and the differences in the approaches to database
a. What is the purpose of introducing an attribute called Product ID to the Product table? What is its data type?b. If the company wants to keep track of the total outstanding balances of customers,
Explain some of the advantages of large databases that organizations can benefit from considering how the amount of data processed and stored in databases will increase in the future.
What are the characteristics of good business rules?
State the differences between a term and a fact.
What is the need for time stamping in modeling time dependent data?
Discuss the main guidelines for defining relationships.
When should an attribute be linked to an entity via a relationship?
The chapter makes a distinction between a required attribute and an optional attribute. Illustrate a required attribute with a relevant example.
State the guidelines for naming entity types. Discuss why organizations customize a purchased data model.
Provide examples (other than those described in this chapter) of multiple relationships, and explain why these examples best represent this type of relationship. Discuss the role of identifiers in
Why is data modeling considered more important than process modeling?
Explain any two characteristics of a good business rule.
Why is time stamping considered an important part of the data modeling process?
Draw an ER diagram reflecting the needs of an instructor to monitor their class performance, and include entities such as class performance, grades, and attendance. This ER model will be used by the
Consider this situation: The faculty at a university (FACULTY entity) can also be part of Board of Studies (BOARD entity). Is there a weak entity here? Why?
Figure 2-27 represents members of a library issuing books and returning them to the library. The members can be students, staff, or faculty, and their details are stored in the Member entity. A

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