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Relational Model Revolutionizes Database Systems, Setting New Industry Standards

The Relational Model
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The Relational Model, developed by Codd in 1970, introduced a new way of organizing data in databases. It includes relations, relational algebra, and integrity rules. SQL language was based on this model. Two key integrity rules, entity integrity and referential integrity, were defined. Initially, these rules were not enforced by Oracle RDBMS, but later versions did. In 1985, Codd established 12 rules to determine if a database system is truly relational, which became crucial for RDBMS providers competing in the market.