scholarly journals A FORMALIZATION OF A FUZZY RELATIONAL DATABASE MODEL USING RELATIONAL CALCULUS

2016 ◽  
Vol 48 ◽  
pp. 83-104 ◽  
Author(s):  
Mohammad Deni Akbar ◽  
Yoshihiro Mizoguchi
Keyword(s):  
Relational Database ◽  
Database Model ◽  
Relational Calculus

Incomplete information in a relational database

1980 ◽  
Vol 3 (3) ◽  
pp. 363-377
Author(s):  
John Grant
Keyword(s):  
Incomplete Information ◽  
Relational Database ◽  
Functional Dependency ◽  
Relational Algebra ◽  
Database Model ◽  
Character String

In this paper we investigate the inclusion of incomplete information in the relational database model. This is done by allowing nonatomic entries, i.e. sets, as elements in the database. A nonatomic entry is interpreted as a set of possible elements, one of which is the correct one. We deal primarily with numerical entries where an allowed set is an interval, and character string entries. We discuss the various operations of the relational algebra as well as the notion of functional dependency for the database model.

Research Background

2013 ◽  
pp. 187-200
Author(s):  
Ibrahim Dweib ◽  
Joan Lu
Keyword(s):  
Data Storage ◽  
Relational Database ◽  
Query Languages ◽  
Xml Schema ◽  
Application Program Interface ◽  
Database Model ◽  
Xml Documents ◽  
Similarities And Differences ◽  
Schema Languages ◽  
Program Interface

In this chapter, the research background is discussed. This includes XML model, XML query languages, XML schema languages, XML Application Program Interface, XML documents types, XML data storage approaches, relational database model, and the similarities and differences between XML model and relational database model. Finally the chapter summary is given.

Proximity relations in the fuzzy relational database model

1989 ◽  
Vol 31 (3) ◽  
pp. 285-296 ◽  
Author(s):  
Sujeet Shenoi ◽  
Austin Melton
Keyword(s):  
Relational Database ◽  
Database Model
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