The relational data model was introduced in 1970, E. F. Codd, a research fellow working for IBM, in his article `A Relational Model of Data for Large Shared Databanks'. The relational database model represented the database as a collection of tables which related to one another.
Unlike network and hierarchical databases, the relational database is quite intuitive to use, with data organised into tables, columns and rows. The table is a list of rows e.g. names and telephone numbers. It is similar to how we might go about the task of jotting down the phone numbers of some of our friends, in the back of our diary for example.
The relational data model consists of a number of intuitive concepts for storing any type of data in a database, along with a number of functions to manipulate the information.
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