SQL multiple primary key關於「SQL primary key foreign key」標籤，搜尋引擎有相關的訊息討論：
Primary and Foreign Key Constraints - SQL Server - Microsoft Learnlearn.microsoft.com › Learn › SQL › SQL ServerPrimary Key and Foreign Key Tutorial in MySQL - YouTubewww.youtube.com › watchWorking with Primary & Foreign key Constraint in SQL Serverwww.youtube.com › watchSQ