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Relational Algebra for Ranked Tables with Similarities: Properties and Implementation
Published on Oct 08, 20076808 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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Chapter list
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