نتایج جستجو برای: relational database
تعداد نتایج: 293759 فیلتر نتایج به سال:
We describe FACTORBASE , a new SQL-based framework that leverages a relational database management system to support multi-relational model discovery. A multi-relational statistical model provides an integrated analysis of the heterogeneous and interdependent data resources in the database. We adopt the BayesStore design philosophy: statistical models are stored and managed as first-class citiz...
Database Watermarking methods are used for copyright protection of relational database. Many techniques have been developed for watermarking multimedia digital assets like audio, video, text, images etc. But these methods are usually not applicable with numerical database, because to insert a watermark into a data, small error is created in data, called mark. An error in relational data is usua...
During the past decade, object-oriented technology has found its way into programming languages, user interfaces, databases, operating systems, expert systems, etc. Products labeled as object-oriented database systems have been in the market for several years, and vendors of relational database systems are now declaring that they will extend their products with object-oriented capabilities. A f...
The study of databases began with the design of efficient storage and data sharing techniques for large amount of data. This paper concerns the processing of imprecision and indiscernibility in relational databases using vague rough technique leading to vague rough relational database model. We utilize the notion of indiscernibility and possibility from rough set theory coupled with the idea of...
Intrusion detection systems play an important role in detecting online intrusions and provide necessary alerts. Intrusion detection can also be done for relational databases. Intrusion response system for a relational database is essential to protect it from external and internal attacks. We propose a new intrusion response system for relational databases based on the database response policies...
Use of database systems for storage and manipulation of business data was revolutionised by the introduction of the relational data model by Edgar Codd in 1970. Since then there have been numerous developments in the area of database modelling. Several new modelling technologies like Object Oriented, Semantic, and NoSQL have been invented. Some of them are having a significant impact in busines...
XML has become an important medium for data exchange, and is frequently used as an interface to (i.e., a view of) a relational database. Although a lot of work has been done on querying relational databases through XML views, the problem of updating relational databases through XML views has not received much attention. In this work, we map XML views expressed using a subset of XQuery to a corr...
The class imbalance problem is an important issue in classification of Data mining. For example, in the applications of fraudulent telephone calls, telecommunications management, and rare diagnoses, users would be more interested in the minority than the majority. Although there are many proposed algorithms to solve the imbalanced problem, they are unsuitable to be directly applied on a multire...
Several database systems have implemented temporal data support, partly according to the model specified in the last SQL standard and partly according to other, older temporal models. In this article we use the most important temporal concepts to investigate their implementations in enterprise database systems. Also, we discuss strengths and weaknesses of these implementations and give suggesti...
This paper reviews the coverage of formal Relational Algebra as it applies to distributed, federated databases in varying network topologies. The review shows that a number of Relational Algebra extensions allow distributed relations and federation of heterogeneous database schema. More concrete physical Relational Algebra extensions support access plans for multi-database query processing but ...
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