Information: - A relational database management system (RDBMS) is a database management system (DBMS) that is based on the relational model as invented by E. F. Codd, of IBM's San Jose Research Laboratory. In 2017, many of the databases in widespread use are based on the relational database model. - R : BASE ( or RBASE ) was the first relational database program for the PC . Created by Wayne Erickson in 1981 , on November 13 , 1981 , Erickson and his brother , Ron Erickson , incorporated the company , MicroRim , Inc. to sell the database , MicroRIM . In June 1998 , A. Razzak Memon , President & CEO of R : BASE Technologies , Inc. ( a privately held company in Murrysville , Pennsylvania , USA ) acquired the R : BASE products from Abacus Software Group . Since 1998 , R : BASE is available as R : BASE for Windows v6.1a , v7.1 , v7.5 , v7.6 , Turbo V - 8 , v9.1 , and now v9.5 ( 32/64 ) for Windows . - A relational database is a digital database whose organization is based on the relational model of data, as proposed by E. F. Codd in 1970. The various software systems used to maintain relational databases are known as a relational database management system (RDBMS). Virtually all relational database systems use SQL (Structured Query Language) as the language for querying and maintaining the database. - A database is an organized collection of data. It is the collection of schemas, tables, queries, reports, views, and other objects. The data are typically organized to model aspects of reality in a way that supports processes requiring information, such as modelling the availability of rooms in hotels in a way that supports finding a hotel with vacancies. - SQL (or , Structured Query Language) is a special-purpose domain-specific language used in programming and designed for managing data held in a relational database management system (RDBMS), or for stream processing in a relational data stream management system (RDSMS). - The relational model (RM) 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 all data is represented in terms of tuples, grouped into relations. A database organized in terms of the relational model is a relational database. What entity does 'r:base' has the relation 'instance of' with?
relational database management system