This is the paper that first introduced the concept of the relational database. You can read about the history of relational databases here: https://en.wikipe

This is the paper that first introduced the concept of the relational database. You can read about the history of relational databases here: https://en.wikipedia.org/wiki/Relational_database#History https://en.wikipedia.org/wiki/Relational_database#History It took almost a decade for the first commercial relational database to appear: "In 1974, IBM began developing System R, a research project to develop a prototype RDBMS. However, the first commercially available RDBMS was Oracle, released in 1979 by Relational Software, now Oracle Corporation."