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Relational Algebra for Ranked Tables with Similarities: Properties and Implementation
Published on 2007-10-086812 Views
The paper presents new developments in an extension of Codd’s relational model of data. The extension consists in equipping domains of attribute values with a similarity relation and adding ranks to
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Presentation
Relational model of data over domains with similarities00:00
Outline00:29
Problem setting pt 101:33
Problem setting pt 203:23
Problem setting pt 304:20
Problem setting pt 405:20
Preliminaries from fuzzy logic05:46
Preliminaries: structures of truth degrees06:20
Problem setting pt 2 (a)07:21
Preliminaries: structures of truth degrees (a)08:16
Our extension of Codd’s model08:34
Functional dependencies11:11
Recalling functional dependencies (FDs)12:28
Fuzzy functional dependencies: syntax13:04
Semantics of FFDs14:32
Semantics of FFD: models, entailment14:41
Relational algebra and calculus14:50
Example I: select power production of countries with large population16:18
Implementation of ranked table in ORDBMS pt 116:29
Implementation of ranked table in ORDBMS pt 216:44
Implementation of ranked table in ORDBMS pt 316:45
Implementation of ranked table in ORDBMS pt 416:46
Future research16:48