DATABASE SYSTEMS (phần 22) 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 ... 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 followin...

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. ... the following description of a database, and then answer the Subquestions 1 through 3. Company M investigated relation schemas as part of its efforts to build a database for mana...

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

Ngày tải lên: 24/08/2012, 15:44

Ngày tải lên: 23/12/2013, 09:15

... Mappings, and Instances (cont.) COP 4710: Database Systems (Day 3) Page 1 Mark Llewellyn COP 4710: Database Systems Spring 2004 Introduction to Database Systems – Part 2 BÀI 2, 1/2 ngày School ... (cont.) COP 4710: Database Systems (Day 3) Page 15 Mark Llewellyn • The overall description of the database is called the database schema. • There are three different types o...

Ngày tải lên: 24/12/2013, 12:16

Ngày tải lên: 21/01/2014, 17:20

... 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 ... ‘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 (Day 17) Pa...

Ngày tải lên: 21/01/2014, 18:20

... created in SQL using the CREATE VIEW command. COP 4710: Database Systems (Day 18) Page 34 Mark Llewellyn An Example Database( +) COP 4710: Database Systems (Day 18) Page 24 Mark Llewellyn Right Outer ... attribute. ### ###  ...

Ngày tải lên: 21/01/2014, 18:20