情境
A state-level vehicle registration system where owners register vehicles, maintain current insurance policies, and state police can verify registration and insurance compliance during traffic stops.
這張圖裡有什麼
看懂背後的決策。
01
One owner can own multiple vehicles, so a one-to-many relationship links Owner to Vehicle.
02
Each vehicle can have multiple historical registrations and insurance policies over time, modeled as one-to-many relationships.
03
StatePoliceCheck references Registration to record law-enforcement verification events without duplicating owner or vehicle data.
Use when designing a database for motor vehicle registration, insurance compliance tracking, or law-enforcement lookup systems.