Advanced Database Technology and Design phần 7 pps

... the bandwidth for the downlink communication (from servers to clients) is much greater than the bandwidth 336 Advanced Database Technology and Design 11 Secure Database Systems Elena Ferrari and ... working 344 Advanced Database Technology and Design [36] Özsu, M. T., and P. Valduriez, Principles of Distributed Database Systems, 2nd ed., Upper Saddle River, NJ: Pre...

Ngày tải lên: 08/08/2014, 18:21

... to remedy the lock and log file problems [24]. 16 Advanced Database Technology and Design 1 Evolution and Trends of Database Technology Adoración de Miguel, Mario Piattini, and Paloma Martínez 1.1 ... However, Evolution and Trends of Database Technology 17 13.4.3 Mapping From Conceptual Schema to Logical Schema 473 13.4.4 Concluding Remarks on the Logical Design...

Ngày tải lên: 08/08/2014, 18:21

... and the fourth the column number. 50 Advanced Database Technology and Design If Sally is processed before Tom, the constraint is never violated, no rule actions are executed, and both Sally and ... B., E. B. Swanson, and G. E. Tompkins, Characteristics of Applications Soft- ware Maintenance, Comm. ACM, Vol. 21, 1 978 , pp. 466 471 . 88 Advanced Database Technology...

Ngày tải lên: 08/08/2014, 18:21

... chapter. 138 Advanced Database Technology and Design Table 5.1 The Suppliers and Parts Database (Sample Values)Current Snapshot Version (Primary Key Attributes in All Examples Are Shown in Bold and Underlined) SS# SNAME ... temporal, many relations that could be derived from that database 140 Advanced Database Technology and Design 2. This term, proposed and def...

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... single interval. 164 Advanced Database Technology and Design • i1 DURING i2 is true if and only if s2 ≤ s1 and e2 ≥ e1 are both true. 9 • i1 STARTS i2 is true if and only if s1 = s2 and e1 ≤ e2 are ... DURING}; /* Warninginadequate! */ 170 Advanced Database Technology and Design query itself is expressed just as if it were a query against a current snapshot data...

Ngày tải lên: 08/08/2014, 18:21

... involved in 232 Advanced Database Technology and Design Conceptual design UML notation Standard design ODL Implementation design OODBMS Figure 7. 3 Design process of an object-oriented database schema. For ... the requirements that will feed an MM-DBMS design. We emphasize the structural complexity and 254 Advanced Database Technology and Design 7. 2.1 Objec...

Ngày tải lên: 08/08/2014, 18:21

... can play in complex 274 Advanced Database Technology and Design x y t A B C D F E R1 R2 T1* T2* q1 q2 T0* (a) C D A Q (b) Time F E A 10 13 17 20È C B (c) Figure 8.4 Spatial and temporal layout ... when generating and evaluating alterna- tive query plans. Section 9.4 examines query processing and optimization in DDBs. 292 Advanced Database Technology and Design must...

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... able to handle nonstandard data so far kept in specialized data stores. 406 Advanced Database Technology and Design Application DBMS Figure 12.1 Nonstandard application using a DBMS and file-based ... engines. 420 Advanced Database Technology and Design 12 Component Database Systems Andreas Geppert and Klaus R. Dittrich 12.1 Introduction DBMSs support individual appl...

Ngày tải lên: 08/08/2014, 18:21

... X → Y and W ⊇ Z, then X,W → Y,Z. • R3 (transitivity): If X → Y and Y → Z, then X → Z. • R4 (pseudo-transitivity): If X → Y and Y,W → Z, then X,W → Z. 456 Advanced Database Technology and Design from ... projects. 440 Advanced Database Technology and Design [44] Geppert, A., S. Scherrer, and K. R. Dittrich, KIDS: A Construction Approach for Database Management Sy...

Ngày tải lên: 08/08/2014, 18:21

... directions and trends, 28285 image retrieval, 276 79 video retrieval, 279 80 CORBAservices, 422 Coupling modes deferred, 77 defined, 77 intermediate, 77 , 79 520 Advanced Database Technology and Design Timos ... 276 object relationship, 277 semitemporal database, 14849 simple visual feature, 276 spatial, 271 uncertainty, handling of, 285 user-defined attribute, 277...

Ngày tải lên: 08/08/2014, 18:21