Managing time in relational databases- P1

dữ liệu lịch sử đầu tiên thể hiện chính nó như là bản sao lưu vàlog chúng tôi lưu giữ và hy vọng sẽ bỏ qua. Chúng tôi hy vọng sẽ bỏ qua nhữngdatasets bởi vì nếu chúng tôi đã phải sử dụng chúng, nó có nghĩa là một cái gì đóđã đi sai, và chúng tôi đã phải khôi phục lại trạng thái củacơ sở dữ liệu trước khi điều đó xảy ra. Sau đó, khi lưu trữ dữ liệuvà tiếp cận công nghệ đã làm cho nó có thể để quản lý ồ ạtkhối lượng lớn dữ liệu...
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Managing time in relational databases- P1MANAGING TIME INRELATIONAL DATABASES Companion Web site Ancillary materials are available online at:www.elsevierdirect.com/companions/9780123750419MANAGING TIME INRELATIONAL DATABASESHow to Design, Updateand Query Temporal Data TOM JOHNSTON RANDALL WEIS AMSTERDAM • BOSTON • HEIDELBERG • LONDON NEW YORK • OXFORD • PARIS • SAN DIEGO SAN FRANCISCO • SINGAPORE • SYDNEY • TOKYO Morgan Kaufmann Publishers is an imprint of ElsevierMorgan Kaufmann Publishers is an imprint of Elsevier.30 Corporate Drive, Suite 400, Burlington, MA 01803, USAThis book is printed on acid-free paper.# 2010 ELSEVIER INC. All rights reserved.No part of this publication may be reproduced or transmitted in any form or by any means,electronic or mechanical, including photocopying, recording, or any information storage andretrieval system, without permission in writing from the publisher. Details on how to seekpermission, further information about the Publisher’s permissions policies and our arrangementswith organizations such as the Copyright Clearance Center and the Copyright Licensing Agency,can be found at our website: www.elsevier.com/permissions.This book and the individual contributions contained in it are protected under copyright by thePublisher (other than as may be noted herein).NoticesKnowledge and best practice in this field are constantly changing. As new research and experiencebroaden our understanding, changes in research methods, professional practices, or medicaltreatment may become necessary.Practitioners and researchers must always rely on their own experience and knowledge inevaluating and using any information, methods, compounds, or experiments described herein.In using such information or methods they should be mindful of their own safety and the safetyof others, including parties for whom they have a professional responsibility.To the fullest extent of the law, neither the Publisher nor the authors, contributors, or editors,assume any liability for any injury and/or damage to persons or property as a matter of productsliability, negligence or otherwise, or from any use or operation of any methods, products,instructions, or ideas contained in the material herein.Library of Congress Cataloging-in-Publication DataApplication submittedBritish Library Cataloguing-in-Publication DataA catalogue record for this book is available from the British Library.ISBN: 978-0-12-375041-9For information on all Morgan Kaufmann publications,visit our Web site at www.mkp.com or www.elsevierdirect.comPrinted in the United States of America10 11 12 13 14 5 4 3 2 1ABOUT THE AUTHORSTom Johnston Tom Johnston is an independent consultant specializing in thedesign and management of data at the enterprise level. He has adoctorate in Philosophy, with an academic concentration inontology, logic and semantics. He has spent his entire workingcareer in business IT, in such roles as programmer, systems pro-grammer, analyst, systems designer, data modeler and enterprisedata architect. He has designed and implemented systems in overa dozen industries, including healthcare, telecommunications,banking, manufacturing, transportation and retailing. His currentresearch interests are (i) the management of bi-temporal datawith today’s DBMS technology; (ii) overcoming this newest gener-ation of information stovepipes—for example, in medical recordsand national security databases—by more cleanly separating thesemantics of data from the syntax of its representation; and (iii)providing additional semantics for the relational model of databy supplementing its first-order predicate logic statements withmodalities such as time and person.Randall J. Weis Randall J Weis, founder and CEO of InBase, Inc., has morethan 24 years of experience in IT, specializing in enterprise dataarchitecture, including the logical and physical modeling of verylarge database (VLDB) systems in the financial, insurance andhealth care industries. He has been implementing systems with stringent temporaland performance requirements for over 15 years. The bi-temporalpattern he developed for modeling history, retro activity andfuture dating was used for the implementation of IBM’s InsuranceApplication Architecture (IAA) model. This pattern allows themultidimensional temporal view of data as of any given effectiveand assertion points in time. InBase, Inc. has developed software used by many of thenation’s largest companies, and is known for creating the firstpopular mainframe spellchecker, Lingo, early in Randy’s career.Weis has been a senior consultant at InBase and other companies,such as PricewaterhouseCoopers LLP, Solving IT International viiviii ABOUT THE AUTHORS ...