Tài liệu Date on Database Writings 2000–2006

About the Author . xix
Acknowledgments xxiii
Preface xxv
PART 1 ■ ■ ■ Some Preliminaries
■CHAPTER 1 Edgar F. Codd: A Tribute and Personal Memoir . 3
■CHAPTER 2 An Interview with Chris Date . 13
■CHAPTER 3 Good Writing Does Matter 23
PART 2 ■ ■ ■ And Now for Something
Completely Different
■CHAPTER 4 On the Notion of Logical Difference . 35
■CHAPTER 5 On the Logical Difference Between Model
and Implementation . 51
■CHAPTER 6 On the Logical Differences Between Types, Values,
and Variables . 69
PART 3 ■ ■ ■ Relational Database Management
■CHAPTER 7 Why We Need Type BOOLEAN . 105
■CHAPTER 8 What First Normal Form Really Means . 107
■CHAPTER 9 A Sweet Disorder . 139
■CHAPTER 10 Double Trouble, Double Trouble . 159
■CHAPTER 11 Multiple Assignment 181
■CHAPTER 12 Data Redundancy and Database Design 217
■CHAPTER 13 Data Redundancy and Database Design:
Further Thoughts Number One 255
■CHAPTER 14 Tree-Structured Data . 271
■CHAPTER 15 Twelve Rules for Business Rules 299
PART 4 ■ ■ ■ SQL Database Management
■CHAPTER 16 Two Remarks on SQL’s UNION . 313
■CHAPTER 17 A Cure for Madness 319
■CHAPTER 18 Why Three- and Four-Valued Logic Don’t Work . 329
PART 5 ■ ■ ■ Further Relational Misconceptions
■CHAPTER 19 There’s Only One Relational Model 345
■CHAPTER 20 The Relational Model Is Very Much Alive! 361
■CHAPTER 21 What Do You Mean, “Post-Relational”? 369
■CHAPTER 22 A Database Disconnect . 383
PART 6 ■ ■ ■ Subtyping and Inheritance
■CHAPTER 23 Is a Circle an Ellipse? . 389
■CHAPTER 24 What Does Substitutability Really Mean? . 409
PART 7 ■ ■ ■ Relational vs. Nonrelational Systems
■CHAPTER 25 Models, Models, Everywhere, Nor Any Time to Think 437
■CHAPTER 26 Basic Concepts in UML: A Request for Clarification . 445
■CHAPTER 27 A Comparison Between ODMG and The Third Manifesto . 457
■CHAPTER 28 An Overview and Analysis of Proposals Based on
the TSQL2 Approach 481
■APPENDIX The Role of the Trade Press in Educating the
Professional Community: A Case Study 515
■INDEX 527