It was Codd who proposed a mathematical foundation for databases (relational algebra) in 1970 (as part of an article titled A Relational Model of Data for Large Shared Data Banks). Using a relational ...

The entity relationship to data modeling (including network hierarchical and object-oriented), emphasis on the relational model. Use of existing database systems for the implementation of information ...

The same model could ... themselves to relational algebra, and you really don’t need transactions here. The file system is fine, and metadata would be better off in document database.

In this paper, the authors describe a custom relational algebra query software environment that enables database instructors to teach relational algebra programming. Instead of defining query ...

“All the RDBMS players already extend themselves beyond traditional relational-model databases to support different unstructured data and columnar formats,” said Soumendra Mohanty, executive VP and ...