Oracle CREATE TABLE VARCHAR default關於「Oracle CREATE TABLE PRIMARY KEY」標籤，搜尋引擎有相關的訊息討論：
Oracle / PLSQL: Primary Keys - TechOnTheNetwww.techonthenet.com › oracle › primary_keysHow to Use Oracle PRIMARY KEY Constraint to Manage Primary Keyswww.oracletutorial.com › Oracle BasicsPrimary Key | Richard Foote's Oracle Blogrichardfoote.wordpress.com › category › primary-k