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Indeholder "Preface", "Acknowledgments", "Part 1: Basic Concepts", "Chapter 1. Data and Data Models", "1.1 The Meaning of Data", "1.2 Data Modeling", "1.3 Data Model Definition", "Exercises", "Chapter 2. Structures", "2.1 Abstractions", "2.2 Sets - Domains and Attributes", "2.3 Relations - Entities
Lærebogen fra et kursus ved Nigel Derrett, ca 1982, såvidt jeg huske
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and Relationship", "2.4 Representation - Tables and Graphs", "Exercises", "Chapter 3. Constraints", "3.1 Introduction", "3.2 Sets - Domains and Attributes", "3.3 Relations - Entities and Relationship", "3.4 Representation - Tables and Graphs", "Exercises", "Chapter 4. Operations", "4.1 Selection", "4.2 Navigation", "4.3 Specification", "4.4 Data Base Procedures", "4.5 Data Types and Data Models", "4.6 Concluding Remarks", "Exercises", "Part 2: Data Models I", "Chapter 5. Relational Data Models", "5.1 Introduction", "5.2 Structures", "5.3 Constraints", "5.4 Navigational Operations", "5.5 Specification Operations", "5.6 The RM/T Data Model", "Exercises", "Chapter 6. Network Data Models", "6.1 Introduction", "6.2 Structures", "6.3 Constraints", "6.4 Navigational Operations", "6.5 Specification Operations", "Exercises", "Chapter 7. Hierarchical Data Models", "7.1 Introduction", "7.2 Structures", "7.3 Constraints", "7.4 Navigational Operations", "7.5 Specification Operations", "Exercises", "Part 3: Data Models II", "Chapter 8. Entity-Relationship Data Models", "8.1 Introduction", "8.2 Structures", "8.3 Constraints", "8.4 Operations", "8.5 Concluding Remarks", "Exercises", "Chapter 9: Binary Data Models", "9.1 Introduction", "9.2 Structures", "9.3 Constraints", "9.4 Operations", "9.5 Concluding Remarks", "Exercises", "Chapter 10: Semantic Network Data Models", "10.1 Introduction", "10.2 Structures", "10.3 Constraints", "10.4 Operations", "10.5 Concluding Remarks", "Exercises", "Chapter 11: Infological Data Models", "11.1 Introduction", "11.2 Structures", "11.3 Constraints", "11.4 Operations", "11.5 Concluding Remarks", "Exercises", "Part 4: Using Data Models", "Chapter 12: Schema Design", "12.1 Data Model Evaluation and Selection", "12.2 Requirements Analysis", "12.3 Enterprise Description", "12.4 Data Base Description", "12.5 Physical Data Base Design", "12.6 User-Oriented Design", "Exercises", "Chapter 13: Schema Analysis", "13.1 Getting a Better Schema", "13.2 Dependencies", "13.3 Decomposition", "13.4 Decomposition Evaluation", "13.5 Concluding Remarks", "Exercises", "Chapter 14: DBMS Mappings", "14.1 Introduction", "13.2 Structure and Constraint Mappings", "14.3 Operation Mappings", "14.4 Data Base Translation", "14.5 Concluding Remarks", "Exercises", "Appendix", "References", "Index".Lærebogen fra et kursus ved Nigel Derrett, ca 1982, såvidt jeg huske
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Genres
Publication
Prentice Hall (1982), Hardcover, 381 pages
Language
Original language
English
Physical description
381 p.; 24.1 cm
ISBN
0131964283 / 9780131964280
Local notes
Omslag: George Alon Jaediker
Omslaget forestiller en databasemodel
Indskannet omslag - N650U - 150 dpi
Prentice-Hall software series
Side 257: It is not surprising that, for a given data base, after specification of what is considered to be a proper set of constraints, one may find that most of the existing data do not abide by the constraints. Unfortunately, most real data bases are very "dirty". That is, they contain data that do not abide by the formal constraints derived from the requirements analysis. This situation should not be considered a fault of the data base. The world is full of special cases which are not thought of when specifying constraints. The data bases accept and digest these special cases, while the constraint specification and enforcement do not.
Omslaget forestiller en databasemodel
Indskannet omslag - N650U - 150 dpi
Prentice-Hall software series
Side 257: It is not surprising that, for a given data base, after specification of what is considered to be a proper set of constraints, one may find that most of the existing data do not abide by the constraints. Unfortunately, most real data bases are very "dirty". That is, they contain data that do not abide by the formal constraints derived from the requirements analysis. This situation should not be considered a fault of the data base. The world is full of special cases which are not thought of when specifying constraints. The data bases accept and digest these special cases, while the constraint specification and enforcement do not.
Pages
381
DDC/MDS
| 001.64 |