Towards a Flexible Query Language
نویسندگان
چکیده
Defining and processing flexible queries is an important research topic in database area. We may distinguish two ways to support flexible querying in databases: (i) developing interface systems that allow queries in pseudo-natural language, or (ii) developing an extended SQL-like languages. In this paper, we have adopted this second approach. The objective of this paper is to introduce a conceptual query language for accessing FSM-based databases. FSM is a data model that has been recently proposed. The paper also adresses the extension of binary and set operators used to express fuzzy conditions in query formulation.
منابع مشابه
Towards a Flexible Query Language for FSM-Based Databases
Defining and processing flexible queries is an important research topic in database area. We may distinguish two ways to support flexible querying in databases: (i) developing interface systems that allow queries in pseudo-natural language, or (ii) developing an extended SQL-like languages. In this paper, we have adopted this second approach. The objective of this paper is to introduce a concep...
متن کاملQuery Brokers for Distributed and Flexible Query Evaluation
This paper presents our work on supporting flexible query evaluation over large distributed, heterogeneous, and autonomous sources. Flexibility means that the query evaluation process can be configured according to application contextspecific, resources constraints and also can interact with its execution environment. Our query evaluation is based on Query Brokers as basic units which allow the...
متن کاملانتخاب مناسبترین زبان پرسوجو برای استفاده از فراپیوندها جهت استخراج دادهها در حالت دیتالوگ در سامانه پایگاه داده استنتاجی DES
Deductive Database systems are designed based on a logical data model. Data (as opposed to Relational Databases Management System (RDBMS) in which data stored in tables) are saved as facts in a Deductive Database system. Datalog Educational System (DES) is a Deductive Database system that Datalog mode is the default mode in this system. It can extract data to use outer joins with three query la...
متن کاملDoCQS: A System for Supporting Data-oriented Querying over Web Content
Witnessing the richness of data in document content and many ad-hoc efforts for finding such data, we propose a Data-oriented Content Query System (DoCQS), which is oriented towards fine granularity data of all types by searching directly into document content. DoCQS uses the relational model as the underlying data model, and offers a powerful and flexible Content Query Language (CQL) to adapt ...
متن کاملBeta-Algebra: Towards a Relational Algebra for Graph Analysis
Graph analysis is an essential tool to understand natural and man-made networks, such as social networks, food webs, transportation infrastructures, etc. Although graph analysis has fomented the development of algorithms, visual tools, and distributed processing frameworks, there is still little support for analysis at the query language level. Current graph query languages are mostly concerned...
متن کامل