And its theoretical concepts are based on set theory and first-order predicate logic. The building blocks of the relational model has been developed on the concept of mathematical relation. The relational data model is employed for storing and processing the data in the database. But, its commercial implementations were observed in the 1980s. Relational Data Model was first prosed by Ted Codd of IBM in the 1970s. Characteristics of Relational database model.In this section, we will discuss the relational model, its diagram, its characteristics, its constraints, advantages & disadvantages in detail. There is a lot more to discuss about, the relational model. The relational model expresses the data and relationship among the data in the form of tables.
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