關於「Oracle check primary key」標籤，搜尋引擎有相關的訊息討論：

How to get primary key column in Oracle? - Stack Overflowstackoverflow.com › questions › how-to-get-primary-key-...Oracle / PLSQL: Retrieve primary key information - TechOnTheNetwww.techonthenet.com › oracle › questions › find_pkeysHow to find out the primary key of oracle apps