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If you assume that a relation has no duplicate data, how do you know there is always at least one primary key?
Explain the term foreign key and give an example. Explain how primary keys and foreign keys are denoted in this book.
Describe four uses of a primary key. What is a surrogate key, and under what circumstances would you use one? How do surrogate keys obtain their values?
Define the term unique key and give an example. Define the term nonunique key and give an example. Give an example of a relation with a unique composite key.
Explain the use of the terms file, record, and field. Explain the use of the terms relation, tuple, and attribute.
Why is the relational model important? Define the term entity and give an example of an entity (other than the one from this chapter).
Describe problems that are likely to occur when inserting, updating, and deleting data in these spreadsheets.
Create a sample list of purchased inventory items and vendors and a second list of customers and sales.
Explain why this relation does not meet the relational design criteria set out in this chapter (that is, why this is not a well-formed relation).
Describe two modification anomalies that affect PROJECT. Are all the nonkey attributes (if any) dependent on the primary key?
Discuss the benefits and drawbacks of each format for users. Examine the processing hardware requirements for both the HD-DVD and Blu-ray.
What are the top three protocols based on frequency? How long did the capture last? Using the endpoints feature discuss your traffic patterns.
Write a program to perform analysis and downsampling operations and another to perform upsampling and synthesis operations for an image compression application.
Write a program for the detection of voiced and unvoiced segments using the AMDF function. Test your algorithm on the test . snd sound file.
Create an XHTML form for a web poll that uses the GET method, the POST method. Rank products or services that you will use for your project in phase I.
Refine and finalize your website by Finalize a navigation system between the pages. Utilizing the server-side elements offered in the textbook for testing form.
Explain 3 (three) most important use cases for the subsystem and develop communication diagrams or sequence diagrams for these use cases.
What is the difference between the Internet and the World Wide Web? Create at least three statements that identify the differences between the two.
List possible objects in the bookstore operation, including their attributes and methods
What data validation checks would the clinic need for the new patient data entry screen (GUI design)? Write a brief memo with your recommendations.
You are to consider how to implement a virtual infrastructure for the company and prepare a report for the board of ACL Realty.
Which products should be prioritised for increase in sales? What will be impact on product sales if free shipping is provided to all products?
Evaluate which method would be efficient for planning proactive concurrency control methods and lock granularities.
Analyze the summary of your data. What are the mean and median average incomes? What can you conclude from this data analysis/visualization?
Define and explain Process Control Networks. In relation to interfacing, in your own words define and explain LAN, WAN, and VPN.