oracle 12c 官方文档
http://www.oracle.com/pls/db121/homepage
oracle 12c 软件下载
http://www.oracle.com/technetwork/database/enterprise-edition/downloads/index.html
oracle 12c 官方文档
http://www.oracle.com/pls/db121/homepage
oracle 12c 软件下载
http://www.oracle.com/technetwork/database/enterprise-edition/downloads/index.html