shuijian-xu / hive

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logical model #24

Open shuijian-xu opened 5 years ago

shuijian-xu commented 5 years ago

Once the DBMS had been chosen, then a logical model would be produced. The logical model was normally expressed as a schema in textual form. So, for instance, where the solution was to be implemented using a relational database, a relational schema would be produced. This consisted of a set of relations, the relationships expressed as foreign key constraints, and a set of domains from which the attributes of the relations would draw their values.