In this article we present a mathematical data model for the most common noSQL databases—namely, key/value relationships—and demonstrate that this data model is the mathematical dual of SQL’s ...

Object-relational databases (ORDBs) are a hybrid between relational and object databases, which extend the relational model with some object features, such as user-defined types, inheritance, and ...

Keyword Search Over Relational Databases(KSORD) has been widely studied in recent years. However, existing KSORD methods are usually based on schema graph or data graph and they are actually ...

The relational model for database management is an approach to managing data using a structure and language consistent with first-order predicate logic, first described in 1969 by Edgar F. Codd, where ...

For over four decades, Relational database management systems RDBMS have been the primary model for data storage, retrieval and management. However, due to the continuous information growth in current ...

A relational database is a type of database that stores and provides access to data points that are related to one another.Relational databases are based on the relational model, which is a way of ...

The rise of new data types is leading to new ways of thinking about data, and newer data storage and management technologies, such as Hadoop, Spark, and NoSQL, are disruptive forces that may ...

Most data stream management systems are based on extensions of the relational data model and query languages, but rigorous analyses of the problems and limitations of this approach, and how to ...

Relational Databases. Relational databases became the database of choice across business and industry in the 1980s. This database approach is based on work done by Dr. E. F. Codd at IBM in the late ...