Oracle CREATE TABLE primary key關於「Oracle delete primary key」標籤，搜尋引擎有相關的訊息討論：
How to delete the primary key from without using constraint namestackoverflow.com › questions › how-to-delete-the-primar...drop primary key constraint - SQL & PL/SQL - Oracle Forumsforums.oracle.com › ords › apexds › post › drop-primary-...Drpping primary key constraint - A