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Edgar Codd
The relational database was first defined in June 1970 by Edgar Codd, of IBM's San Jose Research Laboratory. Codd's view of what qualifies as an RDBMS is summarized in Codd's 12 rules. A relational database has become the predominant type of database.
Edgar F. Codd, an English computer scientist who worked for IBM, is credited with inventing the relational model for database management. In June 1970, Codd defined the relational database, which is the theoretical basis for relational databases and relational database management systems (RDBMS).
Codd's relational data model established the fundamentals of the relational database model. Codd's view of what qualifies as an RDBMS is summarized in Codd's 12 rules.
RDBMS is a program that allows users to store, manage, query, and retrieve data stored in a relational database. It provides an interface between users and applications and the database, as well as administrative functions for managing data storage, access, and performance.
In 1979, Oracle brought the first commercial relational database to market.
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