Database systems concepts 4th edition phần 10 pptx

... balance from tonumber A -101 Downtown 500 1999/1/1 9:00 1999/1/24 11:30 A -101 Downtown 100 1999/1/24 11:30 * A-215 Mianus 700 2000/6/2 15:30 2000/8/8 10: 00 A-215 Mianus 900 2000/8/8 10: 00 2000/9/5 8:00 A-215 ... document containing 10 occurrences of a term may not be 10 times as relevant as a document containing one occurrence. Silberschatz−Korth−Sudarshan: Database System Conce...

Ngày tải lên: 08/08/2014, 18:22

... Corporation a 10 percent raise. c. Give all managers in the database a 10 percent raise. d. Give all managers in the database a 10 percent raise, unless the salary would be greater than $100 ,000. ... clauser. Silberschatz−Korth−Sudarshan: Database System Concepts, Fourth Edition II. Relational Databases 4. SQL 181 © The McGraw−Hill Companies, 2001 4.13 Dynamic SQL 175 We mus...

Ngày tải lên: 08/08/2014, 18:22

... the Silberschatz−Korth−Sudarshan: Database System Concepts, Fourth Edition III. Object−Based Databases and XML 10. XML 366 © The McGraw−Hill Companies, 2001 364 Chapter 10 XML 10. 2 Structure of XML Data The ... details.) Silberschatz−Korth−Sudarshan: Database System Concepts, Fourth Edition III. Object−Based Databases and XML 10. XML 388 © The McGraw−Hill Companies, 2001...

Ngày tải lên: 08/08/2014, 18:22

... 0 010 1101 1111 101 1 0 010 1100 0011 0000 101 0 0011 101 0 0000 1100 0 110 1001 1111 1100 0111 1 110 1101 101 1 1111 0011 101 0 1111 0001 0 010 0100 100 1 0011 0 110 1101 0011 0101 101 0 0 110 1100 100 1 1 110 ... 1 110 1011 1101 100 0 0011 1111 100 1 1100 0000 0001 Downtown Mianus Perryridge Redwood Round Hill Figure 12.26 Hash function for branch-name. Silberschatz−Ko...

Ngày tải lên: 08/08/2014, 18:22

... current copy of the database. In the shadow-copy scheme, a transaction that wants to update the database first creates a complete copy of the database. All updates are done on the new database copy, ... new copy of the database; the new copy then becomes the current copy of the database. The old copy of the database is then deleted. Fig- ure 15.2 depicts the scheme, showing the dat...

Ngày tải lên: 08/08/2014, 18:22

... transactions. Silberschatz−Korth−Sudarshan: Database System Concepts, Fourth Edition VI. Database System Architecture 18. Database System Architecture 687 © The McGraw−Hill Companies, 2001 690 Chapter 18 Database System ... State of the log and database corresponding to T 0 and T 1 . Silberschatz−Korth−Sudarshan: Database System Concepts, Fourth Edition VI. Database S...

Ngày tải lên: 08/08/2014, 18:22