DATABASE SYSTEMS (phần 13) pdf

... 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 ... Running Failure Failure Failure Repair Repair Repair Running October, 2005 VITEC Database Systems Engineer Examination (Morning) 1. Examination Time-9:00-10:30 (90 minutes)....

Ngày tải lên: 24/08/2012, 15:44

... employee has an assigned role code according to his/her role (i.e., system engineer, database engineer or network engineer in the systems development department). The participation management system ... 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 data...

Ngày tải lên: 24/08/2012, 15:44

... 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 minutes). ... system Sales performance Masters Masters, sales performance, etc. Operations database Information system Analytical database - 5 - (Shipment scheduling) • Order information i...

Ngày tải lên: 24/08/2012, 15:44

... Database Systems – Part 2 BÀI 2, 1 /2 ngày School of Electrical Engineering and Computer Science University of Central Florida Instructor : Mark Llewellyn markl@cs.ucf.edu CC1 21 1, 82 3 -2 790 http://www.cs.ucf.edu/courses/cop4710/spr2004 COP ... relevant part of the conceptual schema. Schemas, Mappings, and Instances (cont.) COP 4710: Database Systems (Day 3) Page 1 Ma...

Ngày tải lên: 24/12/2013, 12:16

... теперь, когда Шехерезада свободна, она может выдумать такую сказку, - - - - сказку! - Расскажи сказку, Шехерезада! - С радостью, великий царь! Шехерезада сидит у ног царя. Сейчас она ... у него не было ни копейки. Постучался он в один дом и попросил у хозяйки чт - ибудь поесть. - Я умираю от голода, - сказал он. – Если бы у меня были деньги, я заплатил б...

Ngày tải lên: 24/12/2013, 14:16

... view COP 4710: Database Systems (Day 17) Page 15 Mark Llewellyn The PRODUCT Table in Access (-) COP 4710: Database Systems (Day 17) Page 9 Mark Llewellyn An Example Database COP 4710: Database Systems ... or ‘married’) or a formula (e.g., price-10) COP 4710: Database Systems (Day 17) Page 19 Mark Llewellyn The INVOICE Table in Access (-) COP 4710: Database Systems...

Ngày tải lên: 21/01/2014, 18:20

... appropriate SQL DDL statements to define the database. 8.8. Repeat Exercise 8.7, but use the AIRLINE database schema of Figure 5.8. 8.9. Consider the LIBRARY relational database schema of Figure 6.12. Choose the appro- priate action (reject, ... updating, and the specification of views. Most database systems have an interactive interface where these SQL commands can be typed directl...

Ngày tải lên: 07/07/2014, 06:20

... a more accurate description than query optimization. For lower-level navigational database languages in legacy systems- such as the network DML or the hierarchical HDML (see Appendixes E and F)-the programmer ... query execution strategies and choose a reasonably efficient or optimal strategy. Each DBMS typically has a number of general database access algorithms that implement relationa...

Ngày tải lên: 07/07/2014, 06:20

... general, most documents extracted from a database will only use a subset of the attributes, entity types, and relationships in the database. In this example, the subset of the database that is needed is shown in ... useful, data mining must be carried out efficiently on large files and databases. To date, it is not well- integrated with database management systems. We will briefly re...

Ngày tải lên: 07/07/2014, 06:20

... (a,2,3,4 ,6) } (d) {(a,2,3,4,5), (2,a,3,4,5), (a,2,3 ,6, 5)} (e) {(a,2,3,4,5), (2,a,3,7,5), (a,2,3,4 ,6) } (f) {(a,2,3,4,5), (2,a,3,4,5), (a,2,3 ,6, 5), (a,2,3 ,6, 6)} (g) {(a,2,3,4,5), (a,2,3 ,6, 5), (a,2,3 ,6, 6), ... dependency theory and its use in database design include [3, 38, 4 36, 443, 65 6]. Good survey articles on the topic include [66 3, 355]. FDs were introduced in [1 56] , al...

Ngày tải lên: 08/08/2014, 18:22

... Obermarck. Transaction management in the R* dis- tributed database management system. ACM Transactions on Database Systems, 11(4):378–396, 1986. 864 Database Management Systems [387] H. Korth, ... Transactions on Database Systems, 15(2):162–207, 1990. 872 Database Management Systems [567] R. E. Sanders. ODBC 3.5 Developer’s Guide. McGraw-Hill Series on Data Warehousin...

Ngày tải lên: 08/08/2014, 18:22