What are the three main concepts of the relational model identified by dr.codd? 1.manipulation 2.structure 3.integrity 4.none of the listed options
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The three main concepts of relational model identified by Dr. Codd are manipulation, structure and integrity.
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The "three main concepts" of the "relational model" identified by "Dr. Codd" are "manipulation, structure, and integrity". Data manipulation is manipulation or changes needed to be made in the operations that are needed to be performed on the data. The data structure in the relational model is a set of relations and domains that defines the way data can be represented and stored. Data integrity is to avoid any discrepancies and ensure that the data is secure, crash recovery and security mechanisms are musts..
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