与连接实体有关系吗？
在两个实体之间的多对多关系上，之间会有一个连接实体。
我的问题是，连接实体可以与另一个实体有关系吗？谢谢你！ （：
On many to many relationship between two entity, there will be a junction entity in between.
My question is, can the junction entity have relationship with another entity? Thank you! (:
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是的。如果新实体与关系相关而不是两个父实体相关，那么这绝对是可能的。
一个例子：假设您想要跟踪客户为某一特定购买（产品）所做的付款。您将拥有三张桌子。
上面的付款表与采购表（这是一个联结实体）存在父子关系。其他关系（例如多对多）同样有效。
Yes. If the new entity is related to the relationship instead of the two parent entities, then it is definitely possible.
One example :Let's say you want to track the payments made for a particular purchase (of a product) by a customer. You will have the three tables.
The Payments table above is in a parent-child relationship with the Purchase table (which is a junction entity). Other relationships (such as many-to-many)are equally valid.
当然可以。通常，连接实体是“弱”实体，这基本上意味着它依赖于另一个实体。但对于那个弱实体来说，与另一个实体建立关系是完全合法的。
举例来说，您有一个简单的审核系统。审计由多个部分组成。每个部分都在单独的表中预定义。因此，您有
audit_definition（其中包含审核定义详细信息）、section_type（其中包含节模板）和audit_section_definition（将两者连接起来）您知道该类型的每次审核要使用哪些部分。然后您就有一个audit_instance 表，其中包含该审核类型的实际审核。要存储该审核实例的部分详细信息，您需要一个
section_instance表。完全可以想象，您需要从section_instance到audit_section_definition的链接，即使后者是联结实体。Sure it can. Typically a junction entity will be a "weak" entity, meaning basically that it's dependent on another entity. But it's perfectly legal for that weak entity to have a relationship with another entity.
Say, for example, you have a simple auditing system. The audit is made up of sections. Each section is predefined in an separate table. So you have
audit_definition, which contains the audit definition details,section_type, which contains the section template, andaudit_section_definition, which connects the two so that you know which sections to use for each audit of that type.Then you have an
audit_instancetable, which contains actual audits of that audit type. To store the section details for that audit instance, you have asection_instancetable. It's entirely conceivable that you would need a link fromsection_instancetoaudit_section_definition, even though the latter is a junction entity.