Kamis, 16 September 2010

Download Star Schema The Complete Reference

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Star Schema The Complete Reference

Star Schema The Complete Reference


Star Schema The Complete Reference


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Star Schema The Complete Reference

About the Author

Christopher Adamson is the founder of Oakton Software LLC and a faculty member at The Data Warehousing Institute. He works with customers in all industries to establish data warehousing strategies, define and prioritize projects, and design solutions. Chris has taught dimensional design to thousands of students worldwide, and has written numerous books and articles.

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Product details

Series: The Complete Reference

Paperback: 510 pages

Publisher: McGraw-Hill Education; 1 edition (July 28, 2010)

Language: English

ISBN-10: 9780071744324

ISBN-13: 978-0071744324

ASIN: 0071744320

Product Dimensions:

7.4 x 1.1 x 9.1 inches

Shipping Weight: 2 pounds (View shipping rates and policies)

Average Customer Review:

4.4 out of 5 stars

42 customer reviews

Amazon Best Sellers Rank:

#243,388 in Books (See Top 100 in Books)

The book is broken down into six parts: I. Fundamentals II. Multiple Stars III. Dimension Design IV. Fact Table Design V. Performance VI. Tools and DocumentationThis is a very natural and logical progression through data modeling and ETL implications. You can read the book from beginning to end and/or use it as a reference when faced with a particular challenge. Star Schema covers a wide range of scenarios with examples that can be easily extrapolated to other industries or your particular data.Even being in IT, IT books can be dry. However, Christopher’s writing style is that of a mentor. He walks you through each topic with examples. Often, I came up with a question only to be answered on the next page. This keeps the reader engaged and that makes for a deeper understanding of the material. Not every Customer Dimension or Sales Fact is modeled the same. After you know the concepts and the data, you can produce the best design.From Conformed Dimensions to Recursive Hierarchies and Bridges, you will see your data and your data model in a new light. Every system needs a strong foundation. This book will help you develop a solid dimensional model that will support and grow as your business does.

For technologists looking for a thorough exploration of the traditional data warehouse star schema, nothing compares to this book. Other reviewers are correct that although works by Ralph Kimball are classics in this space, the content that Adamson provides here is presented in much greater detail with a far greater quantity of examples, and written very well. While I found myself referencing "The Data Warehouse Toolkit: The Definitive Guide to Dimensional Modeling" by the aforementioned author during a recent data warehouse project, because that resource is introductory many practitioners will likely end up referring to the design tips that The Kimball Group website offers as supplementary material on a more frequent basis, and many of these design tips are really only a point in the right direction.So to get to the point, Adamson offers great advice and explicit step-by-step explanations for many star schema topics. The only area that the author does not delve into is material around specific database products, but readers should be able to research this information after following along with the presentation that the author offers with this work. After discussing the fundamentals of analytic databases and dimensional design, data warehouse architectures, and stars and cubes, the author offers detailed presentations on fact tables, dimensions, hierarchies, bridges, snowflakes, and slowly changing dimensions, followed by discussions on performance and additional topics of interest for developers of dimensional models, including an exploration of some common dimensional features that often strain business intelligence tools, techniques to mitigate any shortcomings, and short discussions on process, design, and documentation.One great example of the thoroughness of this book is the presentation that the author offers in Chapter 10 ("Recursive Hierarchies and Bridges"). After discussing types of recursive hierarchies (balanced versus unbalanced and attribute-based versus instance-based), reporting challenges associated with recursive hierarchies, and the process and implications with flattening such hierarchies, Adamson delves into the hierarchy bridge, providing a detailed walkthrough of how to construct it and use it, how to avoid double-counting, how to hide the bridge from novice users, how to resolve the many-to-many relationship, and how to handle Type 2 changes to the hierarchy. The step-by-step explanation of this last item is especially well done, with great diagrams and a detailed discussion of the ripple effect of such changes and why you should not resist the ripple effect, despite the additional data involved. This explanation contrasts markedly with other material on this subject. While a single design tip called "Help for Hierarchies" from The Kimball Group, for example, discusses this subject, it is done so at a very high level.As a data architect working through this book for the first time during a project, most of my time was spent in Part 3 ("Dimensional Design"), which breaks down into Chapter 6 ("More on Dimensional Tables"), Chapter 7 ("Hierarchies and Snowflakes"), Chapter 8 ("More Slow Change Techniques"), Chapter 9 ("Multi-Valued Dimensions and Bridges"), and Chapter 10 ("Recursive Hierarchies and Bridges"), although I did spend significant time with Chapter 4 ("A Fact Table for Each Process"), Chapter 11 ("Transactions, Snapshots, and Accumulating Snapshots"), and Chapter 12 ("Factless Fact Tables"). While I will likely continue to reference a number of other resources in this space, this is the one book currently in the marketplace that has staying power for the long-term. Highly recommended.

This book really deserves its 5 stars. It is, by far, the best book on data warehousing I have ever read.Not only is the content very precise and comprehensive, but it is also very well written.Data Warehousing concepts are notoriously difficult to explain. That's why so many well-meaning DW books comes short. If you can only read one book on DW design, then make it this one.Contrary to the title, the book covers Snowflake Schema quite adeptly, and the author is careful to list all the pros and cons of going from Star to Snowflake. That leap from star to snowflake should always be taken with considerable thought.The book is light both on data analytics and ETL. This book is almost all about Star and Snowflake schemas.Pros:1)The best book on data warehousing design I have ever read.2)Comprehensive AND in-depth coverage of both Star and Snowflake schemas.3)Very well written.Cons:1)Doesn't cover much outside of data warehousing. It has light coverage of data analytics and ETL.

This book is a must have for anyone involved in dimensional modelling. I've been modelling relational databases for decades so the idea of redundant data was a mind hurdle that I needed to get over. Adamson did a great job of helping me with that by his practical and unbiased explanations of the pros and cons of the dimensional approach. The book is well organized for reading end to end and also provides a great reference while in the development process. I've had my copy for only 2 months and it's well worn by my constant usage. This book has provided exactly what I needed to completely understand the advantages and disadvantages of various approaches to solve real world business problems with the dimensional model. Adamson is obviously very experienced in this technology, is an excellent writer and has a great website for staying current on this subject.

I have been working designing and developing OLTP databases for 20 years. I am new to Data warehouses and picked up this book based on reviews and I don't have any regrets. I have completed 4 out of 18 chapters ~ 85 pages. I love the way Chris analyses each topic from different angles and explains the pros and cons of each approach. I am fully satisfied with this purchase and would say that this is a great book to clear the concepts of database design for warehouses, which, is very different from OLTP designs.This book does not show how to use a tool. It is purely design concepts. If you are looking for a book that shows how to use a tool, you are looking at the wrong stuff.

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Star Schema The Complete Reference PDF

Star Schema The Complete Reference PDF

Star Schema The Complete Reference PDF
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Sabtu, 11 September 2010

Ebook Download Maimonides (Jewish Encounters Series)By Sherwin B. Nuland

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Maimonides (Jewish Encounters Series)By Sherwin B. Nuland

Maimonides (Jewish Encounters Series)By Sherwin B. Nuland


Maimonides (Jewish Encounters Series)By Sherwin B. Nuland


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Maimonides (Jewish Encounters Series)By Sherwin B. Nuland

Part of the Jewish Encounter series

Moses Maimonides was a Renaissance man before there was a Renaissance: a great physician who served a sultan, a dazzling Torah scholar, a community leader, a daring philosopher whose greatest work—The Guide for the Perplexed—attempted to reconcile scientific knowledge with faith in God. He was a Jew living in a Muslim world, a rationalist living in a time of superstition. Eight hundred years after his death, his notions about God, faith, the afterlife, and the Messiah still stir debate; his life as a physician still inspires; and the enigmas of his character still fascinate.

Sherwin B. Nuland—best-selling author of How We Die—focuses his surgeon’s eye and writer’s pen on this greatest of rabbis, most intriguing of Jewish philosophers, and most honored of Jewish doctors. He gives us a portrait of Maimonides that makes his life, his times, and his thought accessible to the general reader as they have never been before.




From the Hardcover edition.

  • Sales Rank: #394061 in eBooks
  • Published on: 2008-08-19
  • Released on: 2008-08-26
  • Format: Kindle eBook

From Publishers Weekly
Maimonides, one of the preeminent personalities of medieval Jewish history, was a jurist, philosopher, expert in Jewish law, physician at the court of Saladin and a respected and dedicated communal leader. Given all that, it's difficult to understand the decision to present Maimonides's legacy primarily through the lens of his work as a physician. The 12th century was a time of stagnation in the history of medicine, and the author himself concedes that Maimonides contributed very little that was new or innovative to the field. By contrast, his jurisprudential magnum opus, the Mishne Torah, constituted a groundbreaking work in its own day and continues to be authoritative almost a millennium later. Although Nuland acknowledges this in a chapter on Maimonides's religious scholarship, it is dwarfed by the overarching concern with medicine—which seems the primary interest of Nuland, a clinical professor of surgery at Yale. The author does a serviceable job of stitching together this slight, popular biography of the larger-than-life Maimonides, but his writing is marred by an overwrought prologue and some glib generalizations. (Oct.)
Copyright © Reed Business Information, a division of Reed Elsevier Inc. All rights reserved.

From Booklist
Reputedly the greatest figure in Judaism after his namesake, Moses Maimonides (1138 [not, as long supposed, 1135]-1204) was also a great physician. That second identity (he has a third as a philosopher, though no one now comprehends his Guide for the Perplexed, and a fourth as a judge) furnishes the surgeon--author of the National Book Award-winning How We Die (1994) entree into the life of this medieval intellectual titan. Like disproportionately many Jewish sons, Maimonides became a doctor in obedience, Nuland thinks, to the Lord's injunction to his people to choose life. In chapters centered on Maimonides' travels, three great books, and medical papers, Nuland argues that that obedience shows in more than Maimonides' medical career. Maimonides was devoted to sustaining the Jews as a people, and out of that, to human life generally. If he was otherwise a physician of his time, bound by the authority of Hippocrates and Galen, he believed that reason and observation should also inform prescription. A little gem of intellectual biography. Ray Olson
Copyright © American Library Association. All rights reserved

Review
"Will educate and inspire not only people of faith, but all who seek to lead a life of significance and meaning."
--Dr. Jerome Groopman, author of The Anatomy of Hope

"Nuland writes sympathetically, one Jewish doctor considering this most extraordinary of Jewish doctors . . . His book is a guide for those perplexed by Maimonides, as well as those ignorant of him. [It is] a deeply satisfying and humane introduction to the greatest of Jewish thinkers."
--The New York Times Book Review


From the Trade Paperback edition.

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Sabtu, 04 September 2010

Free PDF German for Reading(Second Edition)By John R. Wendel, Karl C. Sandberg

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German for Reading(Second Edition)By John R. Wendel, Karl C. Sandberg

German for Reading(Second Edition)By John R. Wendel, Karl C. Sandberg


German for Reading(Second Edition)By John R. Wendel, Karl C. Sandberg


Free PDF German for Reading(Second Edition)By John R. Wendel, Karl C. Sandberg

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German for Reading(Second Edition)By John R. Wendel, Karl C. Sandberg

German for Reading presupposes no previous acquaintance with German and can be used with equal effectiveness by graduate students in the arts and sciences who are preparing to pass a reading knowledge examination, or by undergraduates who are beginning to deal seriously with the problems of reading. Its programmed format permits it to be used either as a classroom text or by individuals working on their own.

The second edition builds on strengths of the first while updating outdated terminology, removing terms and phrases no longer in use, and incorporating many revisions made in light of suggestions from readers.

  • Sales Rank: #103790 in Books
  • Published on: 2015-09-05
  • Original language: English
  • Number of items: 1
  • Dimensions: 9.25" h x 7.25" w x 1.00" l, .0 pounds
  • Binding: Paperback
  • 548 pages

Review
"Sandberg and Wendel's German for Reading certainly deserves publication in this revised and corrected edition, for the following reasons: Organization: German for Reading takes the approach of quickly showing language in context, concentrating on decoding meaning from available clues, and giving a large number of examples to illustrate the variations available. It does not dwell on discussions of grammatical forms, and avoids confusing terminology. The learning topics in the chapters are grouped from simpler to more complex (and less frequent) structures, giving students a smooth and less frustrating learning curve. Exercises: The exercise examples are filled with quick hints and further directions to help explain specific language usage and exceptions. I have often found reading textbooks have far too few exercises to work with; here we have a format for self-learning, a range of simple and complex examples, and the luxury of plenitude to choose from. Reading examples: In classes where current materials are used students often complain that they are not getting the chance to work with familiar names that they associate with German history and culture. The texts included here are well chosen and will appeal to the target audience for this book." --Rex Clark, Department of Germanic Languages and Literatures, The University of Kansas (retired)

About the Author
The late Karl C. Sandberg was former chairman of the Department of French, Macalester College, as well as co-author of widely used "for Reading" books for French and Spanish.

John R. Wendel, Emeritus of the Department of German Studies, University of Arizona, earned his PhD at the University of Connecticut and taught German and humanities until his retirement.

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Rabu, 01 September 2010

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  • Sales Rank: #764273 in Books
  • Published on: 2013-12-16
  • Original language: English
  • Number of items: 1
  • Dimensions: 9.00" h x .74" w x 6.00" l, .96 pounds
  • Binding: Paperback
  • 326 pages

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