*today is the first class, lecturer divide group for us. she us each group to presant our name, moto and rules in a group.
*after that, we learn chapter 1. we learn about client and server. we also learn overview of DBMS. it's not much differences that what we learn in DADD except a four new things.
*in chapter 2, we learn about EER. there's superclass and subclass where we must determine which will become superclass or subclass.
*total specialization where every entity of superclass must belong to at least one subclass.
*partial specialization where at least one entity of subclass is not belong to any subclass.
*disjoint constraint is about a superclass can belong to most of subclass.
*overlapping constraint specifier that every number of superclass can belong to more than one of the subclass.
*generalization where an entity is made to combine and make a superclass.
*categorization where a single subclass with a relationship that involves more than one distinct superclass.
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