Xem 1-20 trên 319 kết quả Relational theory
  • 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 SQL. This 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.

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  • Views are virtual tables. That means they should be updatable, just as "real" orare. In fact, view updatability isn’t just desirable, it’s crucial, for practical reasons as well as theoretical ones. But view updating has always been a controversial topic. Ever since the relational model first appeared, there has been widespread skepticism as to whether (in general) view updating is even possible.

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  • The aim of this book is to illuminate the essential activity of translation from a number of perspectives: historical and contemporary, theoretical and practical. At the same time, the contents of the present volume speak in many modes and voices to literary and cultural history, and to cross-cultural relations through the ages.The book draws on several hundred texts, translations, and texts about translation, ranging from classical antiquity to the present.

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  • Learn effective and scalable database design techniques in a SQL Server environment. Pro SQL Server 2012 Relational Database Design and Implementation covers everything from design logic that business users will understand, all the way to the physical implementation of design in a SQL Server database. Grounded in best practices and a solid understanding of the underlying theory, Louis Davidson shows how to “get it right” in SQL Server database design and lay a solid groundwork for the future use of valuable business data....

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  • This is a fully revised and updated edition of the major work that teaches health professionals to utilize the 12-lead ECG in daily clinical practice. It deals with the analysis of the morphology of ECG waveforms in order to diagnose many conditions not related to rhythm, including ischemia, acute myocardial infarction, and hypertrophy of the heart muscle. Almost all other texts of morphologic interpretation for non-cardiologists rely heavily on memorizing electrocardiographic patterns.

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  •  Theory of Applied Robotics: Kinematics, Dynamics, and Control (2nd Edition) explains robotics concepts in detail, concentrating on their practical use. Related theorems and formal proofs are provided, as are real-life applications. The second edition includes updated and expanded exercise sets and problems. New coverage includes: components and mechanisms of a robotic system with actuators, sensors and controllers, along with updated and expanded material on kinematics.

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  • This book offers the perspective that nursing theory is essentially connected with nursing practice, research, education, and development. Nursing theories, regardless of complexity or abstraction, reflect nursing and are used by nurses to frame their thinking, action, and being in the world. As guides for nursing endeavors, nursing theories are practical in nature and facilitate communication with those being nursed as well as with colleagues, students, and persons practicing in related health and illness services.

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  • Decision theory in economics, psychology, philosophy, mathematics, and statistics is concerned with identifying the values, uncertainties and other issues relevant in a given decision, its rationality, and the resulting optimal decision. It is closely related to the field of game theory as to interactions of agents with at least partially conflicting interests whose decisions affect each other.

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  • Due to the growth of computer technologies and web technologies, we can easily collect and store large amounts of text data. We can believe that the data include useful knowledge. Text mining techniques have been studied aggressively in order to extract the knowledge from the data since late 1990s. Even if many important techniques have been developed, the text mining research field continues to expand for the needs arising from various application fields. This book is composed of 9 chapters introducing advanced text mining techniques.

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  • What are the compelling reasons for carrying out dynamic speech modeling? We provide the answer in two related aspects. First, scientific inquiry into the human speech code has been relentlessly pursued for several decades. As an essential carrier of human intelligence and knowledge, speech is the most natural form of human communication. Embedded in the speech code are linguistic (as well as para-linguistic) messages, which are conveyed through four levels of the speech chain.

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  • Tham khảo sách 'metal machining theory and applications thomas childs', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Since the discovery of carbon nanotubes about a decade and a half ago by Sumio Iijima, the scientific community involved in various aspects of research related to carbon nanotubes and related technologies has observed a steady progress of the science, as is typical for any new and novel material.

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  • This is the exercise book to accompany the present author's An Introduction to Relational Database Theory. With two exceptions, these exercises are copies of those given at the ends of Chapters 1-7 of that book. The exercises using Rel given with some of those chapters are also included. The first exception is Exercise 7 for Chapter 7, which I have replaced by a precise, detailed specification for a comprehensive database design. The second is a set of additional exercises using Rel, exploring virtual relvars and user-defined type definitions....

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  • The diverse materials comprising Impasses of the Post-Global take as their starting point an interrelated, if seemingly endless sequence of current ecological, demographic, socio-political, economic, and informational disasters. These have impacted on the stakes and tenor of cultural criticism as much as they have on tangible relations in the contemporary world. The contributors to the Impasses struggle as valiantly with a rapidly

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  • This book constitutes the refereed proceedings of the 15th International Conference on Concurrency Theory, CONCUR 2004, held in London, UK in August/September 2004. The 29 revised full papers presented together with 4 invited papers were carefully reviewed and selected from 134 submissions.

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  • Tham khảo sách 'basic ship theory k.j. rawson e.c. tuppermsc', kỹ thuật - công nghệ phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Tham khảo sách 'theory of gas injection processes franklin m. orr', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • The relational Model of Data is based on the concept of a Relation. A Relation is a mathematical concept based on the ideas of sets. The strength of the relational approach to data management comes from the formal foundation provided by the theory of relations. We review the essentials of the relational approach in this chapter.

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  • This book introduces you to the theory of relational databases, focusing on the application of that theory to the design of computer languages that properly embrace it. The book is intended for those studying relational databases as part of a degree course in Information Technology (IT). Relational database theory, originally proposed by Edgar F. Codd in 1969, is a topic in Computer Science. Codd’s seminal paper (1970) was entitled A Relational Model of Data for Large Shared Data Banks (reference [5] in Appendix B)....

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  • This book contains a wealth of useful information on current research on viscoelasticity. By covering a broad variety of rheology, non-Newtonian fluid mechanics and viscoelasticity-related topics, this book is addressed to a wide spectrum of academic and applied researchers and scientists but it could also prove useful to industry specialists. The subject areas include, theory, simulations, biological materials and food products among others.

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