Differentiate between primary and secondary key關於「Differentiate between primary and secondary key」標籤，搜尋引擎有相關的訊息討論：
Difference Between Primary Key And Secondary Keyprogrammerbay.com › difference-between-primary-key-a...6 Difference Between Primary And Secondary Key - Viva Differencesvivadifferences.com › difference-between-primary-and-sec...Secondary keys - IBMwww.ibm.com › docs › tnpm › top