more scope for granularity using the object model than with the relational
model. In a data warehouse logical granularity in the form of normalized
relations or autonomous objects leads to inefficiencies due to a higher reli-
ance on joins between entities, or in the case of the object model, entities
become classes and objects.
1.1.3The Object-Relational Data Model
The object-relational data model simply combines aspects of the relational
model with the object model. It could be said that the object-relational
model attempts to squeeze parts of the object model into the relational
model—unfortunately ...
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