NDLI: SQL-based discovery of exact and approximate functional dependencies

Content Provider	ACM Digital Library
Author	Grasser, Becky Matos, Victor
Abstract	Students in a typical database course are introduced to theoretical design from a functional dependency standpoint. Functional dependencies are rules of the form X→Y, where X and Y are attributes of a relation r(R). Those rules express the potential one-to-one, and many-to-one relationships among the atributes of R. Unfortunately finding the non-trivial rules X→Y from an existing arbitrary relation is a hard problem. We present an extension of the SQL-based algorithm of Bell and Brockhausen [1] to explore a relation and find its exact and approximate functional dependencies. We use the g3 measure of Kivinen and Mannila to express the degree of approximation of a dependency. This application could be used either as an example or a project in an advanced database course.
Starting Page	58
Ending Page	63
Page Count	6
File Format	PDF
ISSN	00978418
DOI	10.1145/1041624.1041658
Journal	ACM SIGCSE Bulletin (SGCS)
Volume Number	36
Issue Number	4
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1978-02-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Database management Languages Computer and information science education Functional dependencies Sql
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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SQL-based discovery of exact and approximate functional dependencies