Fundamentals of Database systems 3th edition PHẦN 4 pps

... 10: Examples of Relational Database Management Systems: Oracle and Microsoft Access 10.1 Relational Database Management Systems: A Historical Perspective 10.2 The Basic Structure of the Oracle ... model yet offer a whole variety of features needed to accomplish the design and implementation of large databases and their applications. An Oracle server consists of an Oracle...

Ngày tải lên: 08/08/2014, 18:22

... Third Normal Forms 43 4 14. 5 Boyce-Codd Normal Form 43 6 14. 6 Summary 43 7 Review Questions 43 8 Exercises 43 9 Selected Bibliography 44 2 Footnotes 44 3 Chapter 15: Relational Database Design Algorithms ... Relational Databases 41 6 14. 1 Informal Design Guidelines for Relation Schemas 41 7 14. 2 Functional Dependencies 42 3 14. 3 Normal Forms Based on Primary Ke...

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... includes records with the following Part# values: 2369, 3760, 46 92, 48 71, 5659, 1821, 10 74, 7115, 1620, 242 8, 3 943 , 47 50, 6975, 49 81, 9208. The file uses eight buckets, numbered 0 to 7. Each ... be reserved for databases containing tens of terabytes. 5.1.2 Storage of Databases Databases typically store large amounts of data that must persist over long periods of t...

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... Page 182 of 893 7 .4 Basic Relational Algebra Operations 7 .4. 1 The SELECT Operation 7 .4. 2 The PROJECT Operation 7 .4. 3 Sequences of Operations and the RENAME Operation 7 .4. 4 Set Theoretic ... <‘ProductA’, 4, ‘Bellaire’, 2> into . c. Insert <‘Production’, 4, ‘ 943 775 543 ’, ‘1998-10-01’> into . d. Insert <‘677678989’, null, 40 .0’> into . e. Inse...

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... replaced by newer offerings. In the interim, we must face the major problem of interoperability—the interoperation of a number of databases belonging to all of the disparate families of DBMSs—as ... UNIVERSITY database schema of Figure 04. 10 in the context of the ODMG object database standard. The mapped object schema using the ODL notation is shown in Figure 12.06....

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... set of inference rules. We defined the concepts of closure and minimal cover of a set of 1 Page 43 7 of 893 • Database system implementation and tuning (Phase 6): During this phase, the database ... process of specialization to refine an entity type into subclasses that we illustrated in Section 4. 2 and Section 4. 3 (see Figure 04. 02, Figure 04. 04, and Figure 04. 05)...

Ngày tải lên: 08/08/2014, 18:22

... compare your own query trees of part (a) and the initial and final query trees of part (b). 18. 14. A file of 40 96 blocks is to be sorted with an available buffer space of 64 blocks. How many passes ... Footnotes The concept of transaction provides a mechanism for describing logical units of database processing. Transaction processing systems are systems with large d...

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... Advanced Database Concepts & Emerging Applications (Fundamentals of Database Systems, Third Edition) Chapter 23: Enhanced Data Models for Advanced Applications Chapter 24: Distributed ... On 1999- 04- 20, 14: 07:33, the database was changed to indicate the hiring of a new employee called Johnson, with the tuple <‘Johnson’, ‘3 344 55667’, 1, null> effectiv...

Ngày tải lên: 08/08/2014, 18:22

... solution of the above equation: {(3 ,4) , (4, 5),(3,5)} = {(3 ,4) , (4, 5)}D p X,Y ({(3 ,4) , (4, 5),(3,5)}{ (3 ,4) , (4, 5),(3.5)}) This solution constitutes a proof theoretic meaning of the rules, ... nodes are 3 ,4, 5 and A = {(3 ,4) , (4, 5)}. From the first and second rules we can infer that (3 ,4) , (4, 5) and (3,5) are in P. We need not look for any other paths, becaus...

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... variable. 1 Page 796 of 893 Appendix D: An Overview of the Hierarchical Data Model (Fundamentals of Database Systems, Third Edition) D.1 Hierarchical Database Structures D.2 ... so it can subsequently be deleted or replaced. 1 Page 8 14 of 893 Selected Bibliography (Fundamentals of Database Systems, Third Edition) Format for Bibliogr...

Ngày tải lên: 08/08/2014, 18:22