如何为通用类图创建表？

Question

我正在开发一个在线求职门户网站。在类图中，我概括了雇主＆amp;员工作为会员班级＆amp;我把'MID'作为主键。现在我很困惑如何为Employer＆amp; amp;创建表格。雇员？

Answer 1

以下是您需要的表格：

Member
========
Id (or MId) (PK)
... (Specifications you need)

Employer
========
Id (PK)
MId (FK to Member table)
... (Specifications you need)

Employee
========
Id (PK)
MId (FK to Member table)
EId (FK to Employer table)
... (Specifications you need)