Entity-Relationship Model - ISA Inheritance | Database Tutorial 3f
In this lecture of the databases course we learn about ISA inheritance in the entity-relationship model (ER model). This is also known as ISA specialization (or generalization). We will see that the ISA can be annotated with constraints disjoint (default is overlapping) and total specialization (every higher-level entity must belong to at least ...
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· Apr 9, 2020