Defining the product type hierarchy.
定义产品类型层次结构。
Do you have many levels in the product type hierarchy?
产品类型层次结构是否分为很多层?
Product type hierarchy: a category in this hierarchy represents a product type.
产品类型层次结构:这种层次结构中的每个类别代表一个产品类型。
As databases have become more powerful, this type hierarchy has grown more complex.
数据库已经变得更强大了,所以这个类型层次结构也变得更复杂。
There is only a single product type hierarchy, whereas there can be many category hierarchies
只有一个产品类型层次结构,但是可以有多个类别层次结构
There is only a single product type hierarchy, whereas there can be many category hierarchies
只有一个产品类型层次结构,但是可以有多个类别层次结构
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