When object-oriented programming languages began to be used in enterprise applications, designers had problems fitting the object-oriented model with the relational model. In the object-oriented model ...

The relational database - or RDBMS - is a triumph of computer science. It has provided the data management layer for almost all major applications for more than two decades, and when you consider that ...

Relational calculus. Query processing and optimization. Transaction processing: failure, recovery, and concurrency. Database security. Logic-based systems. Parallel ...

A database that maintains a set of separate, related files (tables), but combines data elements from the files for queries and reports when required. The concept was developed in 1970 by Edgar Codd, ...

Here's how you can use SQL Server's OpenJson function to dismantle JSON structures into relational tables targeting either transactional systems or data warehouses. JSON is great for moving data ...

A database management system (DBMS) that provides both relational and object database management capabilities. See universal server. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction ...

A tale of dueling open-source projects for object-relational mapping may be brewing within Eclipse, with similar proposals floated by Versant Corp. and Oracle Corp. Versant plans to announce on ...

As a researcher at the University of California, Berkeley, in the early 1970s, Michael Stonebraker co-created the Ingres and Postgres technology that underlies many leading relational databases today: ...

IT業界で仕事をしていると、オブジェクト指向やサービス指向など「 ×指向」という言葉をよく耳にする。何とはなしに使ってはいるものの、正確な意味を問われると答えに窮することがあるものだ。そこで、これらの言葉の原義を確認して、正確な意味を ...

Because any database that does not support the SQL language is, by definition, a "NoSQL" database, some very different databases coexist under the NoSQL banner. Massively scalable data stores like ...