All Relational Database Management System

A relational database management system organizes data as tables of rows and columns rather than as documents, key-value pairs or graphs, following the relational model of data that E. F. Codd proposed in 1970. Wikipedia's own account of the relational database states that a Relational Database Management System, RDBMS, is a type of database management system that stores data in a structured format using rows and columns, and separately that many relational database systems are equipped with the option of using SQL, Structured Query Language, for querying and updating the database. Each product placed under this group implements that same tabular, SQL-queryable design in its own engine, spanning small embedded stores through large commercial and open source systems, which is what separates this class from the document-oriented, key-value, graph, column-oriented and other non-tabular database families this atlas classes separately under the same subcategory. Each member placed under this group carries its own separate citation for the specific fact that puts it in this family.