Fundamentals of information systems seventh edition c

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... 312 Footnotes 312 Part 3: Object-Oriented and Extended Relational Database Technology . 316 Chapter 11 : Concepts for Object-Oriented Databases 316 11 .1 Overview of ... Disk 11 1 5.6 Operations on Files .11 5 5.7 Files of Unordered Records (Heap Files) .11 7 5.8 Files of Ordered Records (Sorted Files) 11 8 5.9 Hashing Techniques ... Chapter 16 : Practical Database Design an...

Ngày tải lên: 08/08/2014, 18:22

... formatted 18 .2 Gbytes, formatted Interface type 80-pin Ultra -2 SCSI 80-pin Ultra -2 SCSI Number of Discs (physical) 12 Number of heads (physical) 24 12 Total cylinders (SCSI only) 9,7 72 9,801 Total ... repair is 24 hours, then the mean time to data loss of a mirrored disk system using 100 disks with MTTF of 20 0,000 hours each is (20 0,000 )2/ (2 * 24 ) = 8.33 * 108 hour...

Ngày tải lên: 08/08/2014, 18:22

... null, ‘40.0’> into Insert into Delete the tuples with = 33 3445555’ Delete the tuple with = ‘98765 432 1’ Page 198 of 8 93 h i j k tuple with = ‘ProductX’ ... relational databases, users were less concerned about migrating their database applications from other types of database systems for example, network or hierarchical systems to relational systems ... the result of the qu...

Ngày tải lên: 08/08/2014, 18:22

... 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 ... SQL Server (of Sybase, Inc.), SQL Server (of Microsoft), and most recently Access (also of Microsoft, Inc.) They were initially single-user systems, but more recently they have starte...

Ngày tải lên: 08/08/2014, 18:22

... Trends of Database Technology 13.1.1 The Evolution of Database Systems Technology 13.1.2 The Current Drivers of Database Systems Technology Section 13.1.1 gives a historical overview of the evolution ... created 12 .5 Object Database Conceptual Design 12 .5. 1 Differences Between Conceptual Design of ODB and RDB 12 .5. 2 Mapping an EER Schema to an ODB Schema Section 12...

Ngày tải lên: 08/08/2014, 18:22

... Chapter 16: Practical Database Design and Tuning 16. 1 The Role of Information Systems in Organizations 16. 2 The Database Design Process 16. 3 Physical Database Design in Relational Databases 16. 4 An ... Context for Using Database Systems Database systems have become a part of the information systems of many organizations In the 1 960 s information systems were dom...

Ngày tải lên: 08/08/2014, 18:22

... Footnotes The concept of transaction provides a mechanism for describing logical units of database processing Transaction processing systems are systems with large databases and hundreds of concurrent ... the size (number of tuples) of the file that results after the JOIN operation This is usually kept as a ratio of the size (number of tuples) of the resulting join file...

Ngày tải lên: 08/08/2014, 18:22

... protection of statistical databases These include McLeish (1 989 ), Chin and Ozsoyoglu (1 981 ), Leiss (1 982 ), Wong (1 984 ), and Denning (1 980 ) Ghosh (1 984 ) discusses the use of statistical databases ... different types of distributed database systems, including federated and multidatabase systems and highlights the problems of heterogeneity and the needs of autonomy in...

Ngày tải lên: 08/08/2014, 18:22

... by: 99 status(X,’gold’) :- 98 status(X,’gold’) AND 98 Miles(X,Y) AND Y>45000 Page 720 of 893 99 status(X,’gold’) :- 98 status(X,’platinum’) AND 98 Miles(X,Y) AND Y>40000 99 status(X,’gold’) :- 98 status(X,’regular’) ... Friesen et al ( 199 5), Vieille ( 199 7), and Dietrich et al ( 199 9) Footnotes Note Note Note Note Note Note Note A historical perspective of these developments a...

Ngày tải lên: 08/08/2014, 18:22

... and Shamkant B Navathe Page 804 of 893 Appendix D: An Overview of the Hierarchical Data Model (Fundamentals of Database Systems, Third Edition) D.1 Hierarchical Database Structures D.2 Integrity ... without defining a view of the database © Copyright 2000 by Ramez Elmasri and Shamkant B Navathe Page 817 of 893 Selected Bibliography (Fundamentals of Database Systems, T...

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... Further Dependencies 11 .1 11. 2 11 .3 11 .4 11 .5 11 .6 11 .7 Properties of Relational Decompositions 334 Algorithmsfor Relational Database Schema Design Multivalued Dependencies and Fourth Normal Form ... SectionldentifierL~

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... Address OfficePhone Age GPA Benjamin Bayer 305-61 -24 35 373-1616 29 18 Bluebonnet Lane null 19 Katherine Ashly 381- 62- 124 5 375-4409 125 Kirby Road null 18 3 .21 2. 89 Dick Davidson 422 -11 -23 20 null 34 52 ... Cooper 489 -22 -1100 376-9 821 Katherine Ashly 381- 62- 124 5 Benjamin Bayer FIGURE 422 -11 -23 20 305-61 -24 35 5 .2 The relation STUDENT 34 52 Elgin Road from Figure 5.1 wit...

Ngày tải lên: 08/08/2014, 18:22