Oracle A lot of version number, first look at the 11g version number description:
Attention:
after the Oracle 9.2 version, Oracle's maintenance release number is changed at the second digit bit. And before that is in the third digit digit.
1. Major Database Release Number
the first digit bit, which represents a new version of the software, also marks some new features. such as 11g, 10g.
2. Database Maintenance Release Number
the second digit bit, which represents a maintenance release level, may also contain some new features.
3. Fusion Middleware Release Number
The third digit bit, which responds to the version number of Oracle Middleware (Oracle Fusion Middleware).
4. Component-specific Release Number
The fourth digit bit, which is primarily for the release level of a component. Different components have different numbers. such as Oracle 's patch package.
5. Platform-specific Release Number
the fifth digit bit, which identifies the version of a platform. usually meansPatchnumber.
Oracle Release Notes