To create a private database link, you must have CREATE DATABASE LINK system
privilege. To create a public database link, you must have CREATE PUBLIC
DATABASE LINK system privilege. Also, you must have CREATE SESSION privilege
on the remote Oracle database.
privilege. To create a public database link, you must have CREATE PUBLIC
DATABASE LINK system privilege. Also, you must have CREATE SESSION privilege
on the remote Oracle database.
http://gigabase.idi.ntnu.no/oradoc/nav/docindex.htm#index-SQL
终于搞定了!谢谢,热心的jiezhi(西域浪子)。