Lecture Database management systems Chapter 6 Functional dependencies

... Objectives At the end of this lesson, you will: • understand the functionalities offered by CDS/ISIS, a textual DBMS; • understand the technical work needed by developers to implement these functionalities; ... understanding of the concepts covered in this lesson Good luck! Exercise What is CDS/ISIS? A set of tools for relational database management A textual...

Ngày tải lên: 31/03/2014, 20:20

... (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] , alon...

Ngày tải lên: 08/08/2014, 18:22

... 289 292 294 34.014 30 .61 2 10.204 7.483 5.782 4. 762 3.741 1.701 1.020 0 .68 0 Total 294 1 76 Preparing for the Project Management Professional Certification Exam Frequency Figure 6- 5 Pareto chart 350 ... responsibility of management. ’’ 168 Preparing for the Project Management Professional Certification Exam Figure 6- 1 Economics of quality Optimum Point 140 120 100 Cost Cost of...

Ngày tải lên: 24/12/2013, 12:16

... used to manipulate relational databases The Relational Database Concept • Proposed by Dr Codd in 1970 • The basis for the relational database management system (RDBMS) • The relational model contains ... defined and established in an ad-hoc manner ~ Croswell, 1991 Relational Database Management System - a database system made up of files with data elements in two-dimen...

Ngày tải lên: 17/03/2014, 00:20

... know that an instance of a 'technical document' can have a title and subject Database management systems - Using a database for document retrieval - page 10 Metadata search We can implement an indexed ... Integration with applications and workflow systems Database management systems - Using a database for document retrieval - page 13 Information portals...

Ngày tải lên: 31/03/2014, 20:20

... everything in the database Database management systems - Using a database for document management - page Using a database for management There are advantages to using systems that manage both document ... same database System Document Meta Data Document Documents Database Using a database for management It is often easier to create a syste...

Ngày tải lên: 31/03/2014, 20:20

... by the two main types of databases: textual and relational Database management systems - Textual, relational and xml databases – page Flat file databases The flat file database can be considered ... following types of database can meet your needs? A relational database A textual database Please click on the answer of your choice Database management systems -...

Ngày tải lên: 31/03/2014, 20:20

... with a relational database SQL is more than simply a query language; it is a database sub-language and is becoming the standard interface to relational and non -relational database management systems ... packages, SQL/ DS and DB2, on this language SQL was adopted as an industry standard in 1986 (SQL- 86) Since then there has been three more standards, SQL- 89, SQL2...

Ngày tải lên: 31/03/2014, 20:20

... System Support for Software Fault Tolerance in Highly Available Database Management Systems by Mark Paul Sullivan Abstract Today, software errors are the leading cause of outages in fault ... differences in the risk to data in main CHAPTER INTRODUCTION memory and on disk 1.3 Existing Approaches to Software Fault Tolerance Current strategies for reduci...

Ngày tải lên: 28/04/2014, 13:32

... criteria for "good" base relations? Informal Design Guidelines for Relational Databases (2)  We first discuss informal guidelines for good relational design  Then we discuss formal concepts of functional ... the process of 2NF normalization Figure 10. 10 Normalizing into 2NF and 3NF Note: The above figure is now called Figure 10. 10 in Edition Figure 10. 11 Normalizati...

Ngày tải lên: 12/05/2014, 11:55

... Group, LLC O 144 Fate of Pharmaceuticals in the Environment and in Water Treatment Systems TABLE 6. 1 (Continued) 261 .25 6. 5e Veterinary therapeutic Quinolone 261 .23 6. 9e Veterinary therapeutic; Aquaculture ... 142 Fate of Pharmaceuticals in the Environment and in Water Treatment Systems One of the most challenging aspects of batch, col...

Ngày tải lên: 18/06/2014, 16:20

... entries if the ODFI and RDFI are parties to an agreement for the provision of services relating to the entries 181 Risks of Automated Clearing House Payments 60 61 62 63 64 65 66 67 68 69 70 71 ... neither the ODFI nor the Originator has actual knowledge of the revocation of the Receiver’s authorization or of the termination of the arrangement between...

Ngày tải lên: 02/07/2014, 16:21