All of todays mainstream database products support the SQL language, and relational theory is what SQL is supposed to be based on. But are those products truly relational? Sadly, the answer is no. This book shows you ...
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ISBN:
(纸本)144936943X;9781449369439
All of todays mainstream database products support the SQL language, and relational theory is what SQL is supposed to be based on. But are those products truly relational? Sadly, the answer is no. This book shows you what a real relational product would be like, and how and why it would be so much better than whats currently *** this unique book, you will:Learn how to see database systems as programming systems Get a careful, precise, and detailed definition of the relational model Explore a detailed analysis of SQL from a relational point of view There are literally hundreds of books on relational theory or the SQL language or both. But this one is different. First, nobody is more qualified than Chris Date to write such a book. He and Ted Codd, inventor of the relational model, were colleagues for many years, and Chriss involvement with the technology goes back to the time of Codds first papers in 1969 and 1970. Second, most books try to use SQL as a vehicle for teaching relational theory, but this book deliberately takes the opposite approach. Its primary aim is to teach relational theory as such. Then it uses that theory as a vehicle for teaching SQL, showing in particular how that theory can help with the practical problem of using SQL correctly and *** computer professional who wants to understand what relational systems are all about can benefit from this book. No prior knowledge of databases is assumed.
Four acknowledged experts in search engine optimization share guidelines and innovative techniques that will help you plan and execute a comprehensive SEO strategy. This second edition brings you up to date on recent ...
ISBN:
(纸本)9781449304218
Four acknowledged experts in search engine optimization share guidelines and innovative techniques that will help you plan and execute a comprehensive SEO strategy. This second edition brings you up to date on recent changes in search engine behaviorsuch as new ranking methods involving user engagement and social mediawith an array of effective tactics, from basic to advanced. Comprehend SEOs many intricacies and complexities Explore the underlying theory and inner workings of search engines Understand the role of social media, user data, and links Discover tools to track results and measure success Recognize how changes to your site can confuse search engines Learn to build a competent SEO team with defined roles Glimpse the future of search and the SEO industry Visit *** for late-breaking updates, checklists, worksheets, templates, and guides."SEO expertise is a core need for todays online businesses. Written by some of the top SEO practitioners out there, this book can teach you what you need to know for your online business." Tony Hsieh, CEO of ***, Inc., author of New York Times bestseller Delivering Happiness
What makes this book different from others on database design? Many resources on design practice do little to explain the underlying theory, and books on design theory are aimed primarily at theoreticians. In this boo...
ISBN:
(纸本)1449328016;9781449328016
What makes this book different from others on database design? Many resources on design practice do little to explain the underlying theory, and books on design theory are aimed primarily at theoreticians. In this book, renowned expert Chris Date bridges the gap by introducing design theory in ways practitioners can understanddrawing on lessons learned over four decades of experience to demonstrate why proper database design is so critical in the first *** chapter includes a set of exercises that show how to apply the theoretical ideas in practice, provide additional information, or ask you to prove some simple theoretical result. If youre a database professional familiar with the relational model, and have more than a passing interest in database design, this book is for *** this book answers include:Why is Heaths Theorem so important? What is The Principle of Orthogonal Design? What makes some JDs reducible and others irreducible? Why does dependency preservation matter? Should data redundancy always be avoided? Can it be? Databases often stay in production for decades, and careful design is critical for avoiding subtle errors and processing problems over time. If theyre badly designed, the negative impacts can be incredibly widespread. This gentle introduction shows you how to use important theoretical results to create good database designs.
Financial market reform has focused chiefly on the threats to stability arising from the risky, uncontrolled activity of the leaders of financial institutions. Nevertheless, organized crime, white-collar crime, and co...
ISBN:
(纸本)1439869227;9781439869222
Financial market reform has focused chiefly on the threats to stability arising from the risky, uncontrolled activity of the leaders of financial institutions. Nevertheless, organized crime, white-collar crime, and corruption have a huge impact on financial systems worldwide and must also be confronted if true reform is to be achieved. A collection of articles written by experts in their fields of study, Financial Crimes: A Threat to Global Security spotlights the importance of addressing the problem of illegal financial activity as part of a greater comprehensive plan for reforming the financial sector. Drawn from the 23rd Annual Meeting of the Academic Council on the United Nations System (ACUNS) held in Vienna, the book explores the major themes discussed at this elite symposium. In the first section, the contributors examine changing concepts in security over the course of history and across nations. They discuss how an event in Austria led to the implementation of a new security philosophy that is now followed by the majority of the European Union. The book examines the diverse models of preventing security threats that have grown from that idea as well as the gradual expansion of the role of the security council of the United Nations. The next section analyzes the present state of security worldwide and examines the wide array of criminal activity that plagues the financial sector. Expert contributors reveal methods to identify certain types of behavior and criminals as well as efforts to combat illegal activityincluding the role of the media. The final section investigates alternative approaches to preventing another worldwide financial disaster through investigative reporting, human factors analysis, legislative initiatives, and other methods. Filled with insight from international experts, the book highlights both the warning signs to illegal activity as well as the most effective methods for combating the invidious corruption that, if unchecked, puts all n
How do the experts solve difficult problems in software development? In this unique and insightful book, leading computer scientists offer case studies that reveal how they found unusual, carefully designed solutions ...
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ISBN:
(纸本)0596510047;9780596510046
How do the experts solve difficult problems in software development? In this unique and insightful book, leading computer scientists offer case studies that reveal how they found unusual, carefully designed solutions to high-profile projects. You will be able to look over the shoulder of major coding and design experts to see problems through their eyes. This is not simply another design patterns book, or another software engineering treatise on the right and wrong way to do things. The authors think aloud as they work through their project's architecture, the tradeoffs made in its construction, and when it was important to break rules. Beautiful Code is an opportunity for master coders to tell their story. All author royalties will be donated to Amnesty International.
SQL is full of difficulties and traps for the unwary. You can avoid them if you understand relational theory, but only if you know how to put the theory into practice. In this insightful book, author C.J. Date explain...
详细信息
ISBN:
(纸本)9781449316402
SQL is full of difficulties and traps for the unwary. You can avoid them if you understand relational theory, but only if you know how to put the theory into practice. In this insightful book, author C.J. Date explains relational theory in depth, and demonstrates through numerous examples and exercises how you can apply it directly to your use of *** second edition includes new material on recursive queries, “missing information” without nulls, new update operators, and topics such as aggregate operators, grouping and ungrouping, and view updating. If you have a modest-to-advanced background in SQL, you’ll learn how to deal with a host of common SQL *** is proper column naming so important? Nulls in your database are causing you to get wrong answers. Why? What can you do about it? Is it possible to write an SQL query to find employees who have never been in the same department for more than six months at a time? SQL supports “quantified comparisons,” but they’re better avoided. Why? How do you avoid them? Constraints are crucially important, but most SQL products don’t support them properly. What can you do to resolve this situation? Database theory and practice have evolved since the relational model was developed more than 40 years ago. SQL and Relational theory draws on decades of research to present the most up-to-date treatment of SQL available. C.J. Date has a stature that is unique within the database industry. A prolific writer well known for the bestselling textbook An Introduction to Database Systems (Addison-Wesley), he has an exceptionally clear style when writing about complex principles and theory
Visualization is the graphic presentation of data -- portrayals meant to reveal complex information at a glance. Think of the familiar map of the New York City subway system, or a diagram of the human brain. Successfu...
ISBN:
(纸本)1449379869;9781449379865
Visualization is the graphic presentation of data -- portrayals meant to reveal complex information at a glance. Think of the familiar map of the New York City subway system, or a diagram of the human brain. Successful visualizations are beautiful not only for their aesthetic design, but also for elegant layers of detail that efficiently generate insight and new understanding. This book examines the methods of two dozen visualization experts who approach their projects from a variety of perspectives -- as artists, designers, commentators, scientists, analysts, statisticians, and more. Together they demonstrate how visualization can help us make sense of the world. Explore the importance of storytelling with a simple visualization exercise Learn how color conveys information that our brains recognize before we're fully aware of it Discover how the books we buy and the people we associate with reveal clues to our deeper selves Recognize a method to the madness of air travel with a visualization of civilian air traffic Find out how researchers investigate unknown phenomena, from initial sketches to published papers Contributors include: Nick Bilton, Michael E. Driscoll, Jonathan Feinberg, Danyel Fisher, Jessica Hagy, Gregor Hochmuth, Todd Holloway, Noah Iliinsky, Eddie Jabbour, Valdean Klump, Aaron Koblin, Robert Kosara, Valdis Krebs, JoAnn Kuchera-Morin et al., Andrew Odewahn, Adam Perer, Anders Persson, Maximilian Schich, Matthias Shapiro, Julie Steele, Moritz Stefaner, Jer Thorp, Fernanda Viegas, Martin Wattenberg, and Michael Young.
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