Fundamentals of information systems seventh edition b
Fundamentals of information systems seventh edition b
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Fundamentals of information systems seventh edition c
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Fundamentals of information systems seventh edition a
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Fundamentals of Database systems 3th edition PHẦN 1 potx
... 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 and Tuning 467 Page of 893 16 .1 The Role of Information Systems in Organizations .468 16 .2 The Database Design Process .4 71 16.3...
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Fundamentals of Database systems 3th edition PHẦN 2 docx
... 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 hours, which is 95, 028 years (Note ... soon 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 time The data is accessed...
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Fundamentals of Database systems 3th edition PHẦN 3 potx
... 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 query, because the constraint that a relation is a set is not enforced Figure 08.02(a) shows the result of query Q0 on the database of Figure 07.06 Page 2 13 of 8 93 QUERY Retrieve...
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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 ... 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 started offering ... 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 database the collection of...
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Fundamentals of Database systems 3th edition PHẦN 5 potx
... 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 .5. 1 discusses how Object Database ... expression of type boolean (that is, a boolean condition), and e an element of the type of elements in collection c Then: Page 355 of 893 (e in c) returns true if element e is a member of collection...
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Fundamentals of Database systems 3th edition PHẦN 6 ppt
... 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 dominated by file systems, but since ... DBMS 16. 2.4 Phase 4: Data Model Mapping (Logical Database Design) 16. 2.5 Phase 5: Physical Database Design 16. 2 .6 Phase 6: Database System Implementation and Tuning We now focus on Step of the database...
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Fundamentals of Database systems 3th edition PHẦN 7 potx
... 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 to the size of the Cartesian ... inclusion of active rules in database systems (see Chapter 23), semantic query optimization techniques may eventually be fully incorporated into the DBMSs of the future 18 .7 Summary Page 544 of 893...
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Fundamentals of Database systems 3th edition PHẦN 8 pot
... 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 federated database systems, which ... On 19 98- 07-30, 08: 31:00, the salary of Smith was corrected to show that it should have been entered as 31000 (instead of 30000 as shown), effective on 19 98- 06-01 On 1999-03- 18, 08: 31:00, the database...
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Fundamentals of Database systems 3th edition PHẦN 9 pptx
... 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 appears in Nicolas ( 199 7) Note A Prolog ... al ( 199 3) Ullman ( 198 5) provides the basis for the NAIL! system, which is described in Morris et al ( 198 7) Phipps et al ( 199 1) describe the GLUE-NAIL! deductive database system Zaniolo ( 199 0)...
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Fundamentals of Database systems 3th edition PHẦN 10 pptx
... 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, Third Edition) Format for ... type of the PCR type An occurrence (or instance) of the PCR type consists of one record of the parent record type and a number of records (zero or more) of the child record type A hierarchical database...
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FUNDAMENTALS OF DATABASE SYSTEMS Fourth Edition phần 1 potx
... 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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FUNDAMENTALS OF DATABASE SYSTEMS Fourth Edition phần 2 pps
... 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 with a different order of tuples ... Road 749- 125 3 25 3.53 Charles Cooper 489 -22 -1100 376-9 821 26 5 Lark Lane 749-64 92 28 3.93 Barbara Benson 533-69- 123 8 839-8461 7384 Fontana Lane null 19 3 .25 5.1 The attributes and tuples of a relation...
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