Once you have your draft E/R diagram prepared, you can begin to analyze the relationships in more detail.
当你准备好你的实体-关系草图后便可以更详细的分析这些详细可以这些“关系”了。
2
A good algorithm to design such a hierarchical database consists of two steps, first, to describe real world in E-R model and then, convert it to the model supported by the DBMS.