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Which of the following was a feature of the extended relational data model created in the mid - 1 9 9 0 s ? a
Which of the following was a feature of the extended relational data model created in the mids
a
It used objectoriented model features in a simpler relational database structure.
b
It was introduced by EF Codd of IBM.
c
It focused on record management rather than handling of relationships.
d
It was created based on mathematical set theory.
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