Oracle Premier、Extended、Sustaining Support的区别可以参考下表:  
Key Features Premier Support Extended Support Sustaining Support
Major Product and Technology Releases
Technical Support
Access to Knowledge Base
Updates and Fixes Pre-existing
Security Alerts Pre-existing
Critical Patch Updates Pre-existing
Tax, Legal, and Regulatory Updates Pre-existing
Upgrade Tools/Scripts Pre-existing
Certification with most existing Oracle products
Certification with most existing third-party products/versions
Certification with most new third-party products/versions
Certification with most new Oracle products
    更详细的关于各类软件的详细规定可以参考以下文档: http://www.oracle.com/us/support/library/057419.pdf http://www.oracle.com/us/support/library/tsp-soc-069318.pdf