题目内容

What are the possible relationships between two entity sets?

A. one-to-one
B. one-to-many
C. many-to-one
D. many-to-many

查看答案

搜索结果不匹配？点我反馈

更多问题

The data models are divided into three classes： models, models and models.

An ____________ is an object, which can be uniquely distinguished from other objects.

The set of all entities of the same type and relationships of the same type are termed as and respectively.

Entities and relationships are to be distinguished using the concept of .