The following text is extract from oracle documentation.
Start the instance, and mount and open the database. This can be done in unrestricted mode, allowing access to all users, or in restricted mode, allowing access for database administrators only.
To mount a database to a previously started, but not opened instance, use the SQL statement ALTER DATABASE with the MOUNT clause as follows:
ALTER DATABASE MOUNT;
You can read it directly from http://download.oracle.com/docs/cd/B19306_01/server.102/b14231/start.htm
The first part gives me an impression that we are mounting the instance to the database. But the
To mount a database to a previously started, but not opened instance part gives me an impression that we are mounting database to an instance.
Which one understanding is right? Anyone can help to explain it please?