The richer data models of object relational databases opens many more options for the logical design of a database schema increasing the complexity of logical database design enormously. Focusing on generalization constructs of conceptual models we explore the performance implications of the various design alternatives for mapping generalizations into the schema of an object-relational database...

BACKGROUND The objective of this research is to compare the relational and non-relational (NoSQL) database systems approaches in order to store, recover, query and persist standardized medical information in the form of ISO/EN 13606 normalized Electronic Health Record XML extracts, both in isolation and concurrently. NoSQL database systems have recently attracted much attention, but few studies...

ABS!l’RACT A theory of probabilistic databases is outlined. This theory is one component of an integrated approach to data-modelling that accomodates both probabilistic and relational data. In fact, many of the results presented here were developed in the context of a framework for structural modelling of systems. Much that is fundamental to relational database theory was also developed in this...

This chapter introduces a fuzzy object-relational database model including fuzzy extensions of the basic object-relational databases constructs, the user-defined data types, and the collection types. The fuzzy extensions of these constructs focus on two main flexible aspects, a way to flexibly compare complex data types and an extension of collection types allowing partial membership of its ele...

Problem statement: The databases introduce the digital era the fact that requirement to maintain large and ample data. The growth of information development and improvement that pursued it transformed the databases into a global reality. This study enquired and described the vital role of storing the context data to an appropriate database in the area of context aware computing. It also addson ...

LOGFLOW is a parallel Prolog system. It is similar to recent parallel database systems concerning its dataflow execution model and its capability of running on shared–nothing architectures. The similarities between LOGFLOW and parallel database systems show that a new database system can be developed based on LOGFLOW in that both relational and deductive queries can be executed. In this paper w...

Nowadays relational databases are extensively covered in almost all database courses. However, protecting the ownership of data against piracy is not yet a major part of these courses. In this paper, we discuss the rationale for incorporating watermarking techniques for relational data for protecting the database ownership. We propose what must be covered so that students in a database course n...

This paper represents the study of various theory based on database model. In this paper a study of various papers is done, and in the reviewed paper graph database and SQL is done. This huge repository of unstructured data has resulted in making the data search and knowledge extraction, a very cumbersome task if one continues using the legacy relational database.

In this position paper, we consider extending relational database systems with a recommendation functionality. In particular, we propose that, along with the results of each query, the user gets additional recommended results that we call “You May Also Like” or Ymal results. We discuss a suite of different approaches to computing Ymal results and exploit one that uses only the database content ...