database normalization

基本解释

Volumes can and have been written about the important topic of database normalization.
数据库标准化是一个重要课题，完全可以就其写出许多著作，而且已经有了许多相关著作。
Classic database normalization would say to create a Pizza table, and then a many-to-many table relating pizza IDs to topping IDs.
典型的数据库标准会建议需要先创建一张比萨表，然后再创建一张将比萨 ID 与浇头 ID 关联起来的多对多表。
To demonstrate, let's apply a little database normalization to the previous example, splitting the owner field of PhoneNumber into a separate person table.
作为演示，我们将一个小的数据库规范化（normalization）应用于上一示例，将 PhoneNumber 的 owner 字段分割到单独的 person 表中。