FUNDAMENTALS OF DATABASE SYSTEMS Fourth Edition phần 2 pps

... Davidson 422 -11 -23 20 null 34 52 Elgin Road 749- 125 3 25 3.53 Barbara Benson 533-69- 123 8 839-8461 7384 Fontana Lane null 19 3 .25 Charles Cooper 489 -22 -1100 376-9 821 26 5 Lark Lane 749-64 92 28 3.93 Katherine ... 1988-05 -22 Administration 4 987654 321 1995-01-01 Headquarters 1 888665555 1981-06-19 IWORKS_ON ESSN PNO HOURS 123 456789 1 32. 5 123 456789 2 7.5 666884444 3 40....

Ngày tải lên: 08/08/2014, 18:22

... available systems included GEMSTONE/OPAL of GemStone Systems, ONTOS of Ontos, Objectivity of Objectivity Inc., Versant of Versant Object Technology, ObjectStore of Object Design, ARDENT of ARDENT Software," and POET of POET Software. These represent ... T 3,B, 15, 12] [starttransaction,T 2 ] [read_item, T 2, B] [write_item,T 2, B, 12, 18] [starUransaction,1;] [rea...

Ngày tải lên: 08/08/2014, 18:22

... 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 ... 128 . 5 .29 . Load the records of Exercise 5 .27 into an expandable hash file, using linear hashing. Start with a 1 Page 129 of 893 may be applied at a finer granularity by breaking...

Ngày tải lên: 08/08/2014, 18:22

... and Architecture 25 2. 1 Data Models, Schemas, and Instances 26 2. 2 Three-Schema Architecture and Data Independence 29 2. 3 Database Languages and Interfaces 32 2.4 The Database System Environment 35 2. 5 Centralized and Client/Server Architectures for DBMSs 38 2. 6 ... Concepts 867 27 .1 Overview of Data Mining Technology 868 27 .2 Association Rules 871 27 .3 Classificati...

Ngày tải lên: 08/08/2014, 18:22

... 1 DNO COUNT(") AVG (SALARY) 5 4 3 325 0 4 3 31000 1 1 55000 Result of0 24 . Grouping EMPLOYEE tuplesbythevalueof DNa. (b) PNAME PNUMBER ESSN PNO HOURS ProductX 1 123 456789 1 32. 5 Productx 1 453453453 1 20 .0 ProductY 2 123 456789 2 7.5 ProductY 2 453453453 2 20.0 ProductY 2 333445555 2 10.0 ProductZ ... 5.0 Newbenefits 30 987654 321 30 20 .0 Newbenefits 30 999887777...

Ngày tải lên: 08/08/2014, 18:22

... guideline. Smith,John B. English,Joyce A. Smith,John B. English,Joyce A. Wong, Franklin T. Narayan,Ramesh K. Wong,Franklin T. Smith,John B. English,Joyce A. Smith,John B. English,Joyce A. Wong, Franklin T. Smith,John B. English,Joyce A. Wong, Franklin T. Narayan,Ramesh K. Wong,Franklin T. Wong,Franklin T. Narayan,Ramesh K. Wong, Franklin T. ENAME Bellaire Bellaire Sugarland Sugarland Sugarlan...

Ngày tải lên: 08/08/2014, 18:22

... physical database design in RDBMSs. 12. 19. Discuss the types of modifications that may be applied to the logical database design of a relational database. 12. 20. What functions do the typical database ... the main buckets null null overflow buckets null 3401 4601 I record pointer ~ "::' v: 981 record pointer 1 321 record pointer 761 1 82 record pointer 91 I record...

Ngày tải lên: 08/08/2014, 18:22

... (13 * 20 00) + «(1/ 125 ) * 10,000 * 125 /4) = 28 ,513 3. Using Method J2 with EMPLOYEE as outer loop: C l l c = bE + (rE * (XDNUMBER + 1)) + «j s oP6 *rE *ro)/bfr ED = 20 00 + (10,000 *2) + «(1/ 125 ) * ... * 125 /4) = 24 ,500 4. Using Method J2 with DEPARTMENT as outer loop: C l l a = b o + (ro * (X ONO + SONO)) + «j sOP6 *rE *ro)/bfr ED ) = 13 + ( 125 * (2 + 80)) + «(1/ 125 ) * 10,000...

Ngày tải lên: 08/08/2014, 18:22

... 20 03-06-01 now Wong 333445555 25 000 4 999887777 1999-08 -20 20 01-01-31 Wong 333445555 30000 5 999887777 20 01- 02- 01 20 02- 03-31 Wong 333445555 40000 5 888665555 20 02- 04-01 now Brown 22 2447777 28 000 4 999887777 20 01-05-01 20 02- 08-10 Narayan 666884444 38000 ... now the current one. 7 72 IChapter 24 Enhanced Data Models for Advanced Applications EMP_VT SUPERVISOR_SSN Smi...

Ngày tải lên: 08/08/2014, 18:22

... Figure 26 .5. 26 .8. Create XML schema documents to correspond to the hierarchies shown in Figures 26 . 12 and 26 .13 part (3). 26 .9. Consider the LIBRARY relational database schema of Figure 5 .20 . Create an XML schema document that corresponds ... semistructured, and unstructured data. Then in Section 26 .2 we turn our attention to the XML standard and 841 Item Support Unk 27...

Ngày tải lên: 08/08/2014, 18:22