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Q21 Single choice

Select one incorrect statement concerning the relational data model.

A
It expresses the real world in a collection of 2-dimensional tables called a relation.
B
It is a model based on set theory.
C
It has a logical structure independent of physical data structure.
D
It is made up of a multiple stage hierarchy where each of the set elements has parent child relationships.
E
It is a model that was proposed by E.
F
Codd in 1970.

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