Relational database management systems (RDBMS) rely on an optimizer (or relational optimizer) that transforms SQL statements into executable code. Before any SQL statement can be run by the RDBMS, the ...

Oracle Database 21c is the result of four decades of development. Oracle Database was the first commercial SQL-based relational database (1979), implemented based on a published IBM specification.

In the area of SQL compliance, new features in version 1.5 of Splice Machine's Hadoop RDBMS include support for foreign keys, which enables referential integrity between tables, and triggers to ...

NoSQL is a response to the dramatic growth of unstructured data within the enterprise, and promises to be the biggest challenge to the established relational database management system (RDBMS ...

In place of the then prevalent hierarchical database approach, in which the structure of data had to be defined within each application program, Codd’s relational database used a new query language ...