who invented relational model
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who invented relational model
who proposed relational model
who developed the relational database model
who introduced relational database model
who originated the entity-relational model
introduction of relational model
what is the relational model
relational model maker online
concept of relational model
describe the concept of relational model
briefly explain a relational model
who invented relational database
create relational model online
the relational data model
history of relational theory
who invented relational model, who proposed relational model, who developed the relational database model, who introduced relational database model, who originated the entity-relational model, introduction of relational model, what is the relational model, relational model maker online, concept of relational model, describe the concept of relational model, briefly explain a relational model, who invented relational database, create relational model online, the relational data model, history of relational theory