情境
This ER diagram models an employee database with salary history, where each employee has a department, a position, and a collection of salary records over time.
這張圖裡有什麼
看懂背後的決策。
01
SalaryHistory is a separate entity to capture changes over time
02
Employee has mandatory references to Department and Position
03
SalaryHistory references Employee with a many-to-one relationship
When developing a human resources system that needs to track employee salaries and their changes.