Towards a Flexible Relational Database Query System

2021 ◽  
Author(s):  
Rachid Mama ◽  
Mustapha Machkour ◽  
Karam Ahkouk ◽  
Khadija Majhadi
Keyword(s):  
Relational Database ◽  
Database Query ◽  
Query System

Keyword-Based Language for Mobile Phones Query Services

2007 ◽  
pp. 369-374
Author(s):  
Z. Abdul-Mehdi
Keyword(s):  
Mobile Phones ◽  
Query Language ◽  
Development Work ◽  
Database Query ◽  
Work Related ◽  
Database Query Language ◽  
Query System

This article will highlight the framework opted by the authors in developing a database query system for usage on mobile phones. As the development work is still in progress, the authors will share some of the approaches taken in developing a prototype for a relationally complete database query language. This work concentrates on developing an application-independent, relationally complete database query language. The remainder of this article is organized as follows. The next section presents some of the existing work related to the study. We then introduce and describe the framework undertaken in order to develop a database query system for mobile phones, and discuss the prototype of the database query language used by the system. We end with our conclusion.

Approximate Data Querying in Fuzzy Relational Database

2002 ◽  
Vol 6 (1) ◽  
pp. 33-40
Author(s):  
Rolly Intan ◽  
◽  
Masao Mukaidono ◽  
Keyword(s):  
Relational Database ◽  
Similarity Relation ◽  
Imprecise Data ◽  
Fuzzy Information ◽  
Fuzzy Similarity ◽  
Fuzzy Similarity Relation ◽  
Data Querying ◽  
Fuzzy Query ◽  
Probability Relation ◽  
Query System

Fuzzy relational database was proposed for dealing with imprecise data or fuzzy information in a relational database. In order to provide a more realistic relation in representing similarity between two imprecise data, we need to weaken fuzzy similarity relation to be weak fuzzy similarity relation in which fuzzy conditional probability relation (FCPR, for short) is regarded as a concrete example of the weak fuzzy similarity relation. In this paper, application of approximate data querying is discussed induced by FCPR in the presence of the fuzzy relational database. Application of approximate data querying in order to provide fuzzy query relation is presented into two frameworks, namely dependent inputs and independent inputs. Finally, related to join operator, approximate join of two or more fuzzy query relations is given for the purpose of extending query system.

Sign in / Sign up

Export Citation Format

Share Document