database systems using oracle ebook

Ngày tải lên: 30/03/2014, 13:20

... Q22 When comparing a relational database with an object-oriented database, which of the following statements correctly describes the object-oriented database? a) It can express real world ... precision ratio used as measures in evaluating information retrieval systems, such as document retrieval systems and data retrieval systems? Here, A , B and C indicate the following. A : The ... is a database in which data additions, changes, and deletions occur at a certain low frequency. The interval between backups has been increased to twice the current level for backing the database...

Ngày tải lên: 24/08/2012, 15:44

... Backup/Restore feature (i) Database backup and restoration can be done for the entire database or for individual tables. (ii) “Entire database backup” saves the entire database on backup media. ... After the database restored by entire database backup, it can be restored to a specific time using the acquired update log and roll-forward processing. (iii) The time required for recovery using ... Network Development 180 135 9,000 6,750 112 Public Sector Systems Development 50 26 2,500 1,325 113 Testing 80400 0 114 Distribution Systems Development 333 149 16,650 7,492 … … … … …...

Ngày tải lên: 24/08/2012, 15:44

... received Shipment Shipment detail Order detail Direct shipment A B October, 2005 VITEC Database Systems Engineer Examination (Afternoon, Part 2) 1. Examination Time-14:30-16:30 (120 ... (1) Entity types are indicated using rectangles. (2) The entity type name is written inside the rectangle. (3) The relationship between entity types is indicated using a line. (4) For a “1-to-1 ... system Sales performance Masters Masters, sales performance, etc. Operations database Information system Analytical database - 5 - (Shipment scheduling) • Order information is organized into...

Ngày tải lên: 24/08/2012, 15:44

Ngày tải lên: 04/10/2013, 19:10

Ngày tải lên: 17/10/2013, 19:15

Ngày tải lên: 20/10/2013, 11:15

... "=" and OPR-2 replacing "<". If so, the rela- tions to be joined using OPR can be sorted using OPR-2 and then merged to produce the required answer. The last piece of needed ... ACM-TODS, June 1976. [BERN81] Bernstein, P. and Goodman, N., "Concurrency Control in Distributed Database Systems, " ACM Computing Surveys, June 1981. [BROW81] Brown, M. et. al., "The Cedar ... can simply modify relations to B-tree using any class of operators defined in the AM relation. The only addition to the modify command is a clause " ;using class" which specifies what operator...

Ngày tải lên: 22/10/2013, 10:15

... students in database classes and to help database practitioners in understanding how to arrive at a definite, clear database design using an entity relationship (ER) diagram. In designing a database ... Although the Barker /Oracle- like model is quite popular, it is implementation dependent upon knowledge of relational databases. The Barker /Oracle model maps directly to a relational database; there ... Database Systems , 3rd ed., Addison-Wesley, Reading, MA, 2000. Maier, D. The Theory of Relational Databases , Computer Science Press, Rockville, MD, 1983. Norman, R.J. Object-Oriented Systems...

Ngày tải lên: 22/10/2013, 10:15

... design of an embedded system using the Unified Modelling Language (UML). The analysed system is a digital sound recorder, or Dictaphone. The design has been implemented using an embedded processor ... updates the internal representation of the time, by using the nextSecond method. When the Time object wraps around, then the date is updated using the nextDay method. The class diagram for the ... monitoring or data logging tasks. Forces • Embedded real-time systems must complete some tasks within strict deadlines. Interactive systems do no have these restrictions. They usually are easier...

Ngày tải lên: 24/10/2013, 23:15

Ngày tải lên: 28/10/2013, 17:15

Ngày tải lên: 28/10/2013, 17:15

Ngày tải lên: 07/11/2013, 11:15

Ngày tải lên: 07/11/2013, 12:15

Ngày tải lên: 07/12/2013, 11:33

... logical standby database • Create a logical standby database by using Enterprise Manager Copyright © 2006, Oracle. All rights reserved. 7 - 4 Benefits of Implementing a Logical Standby Database • Provides ... VIEW LOG Copyright © 2006, Oracle. All rights reserved. 7 - 18 Using the Add Standby Database Wizard Select “Create a new logical standby database. ” Copyright © 2006, Oracle. All rights reserved. 7 ... column in V $DATABASE. • Database guard level is set to ALL by broker automatically on the logical standby database. • Database guard level applies to all users except SYS. Copyright © 2006, Oracle. ...

Ngày tải lên: 09/12/2013, 16:15

Ngày tải lên: 14/12/2013, 16:15

Ngày tải lên: 14/12/2013, 16:15

Ngày tải lên: 14/12/2013, 16:15