Now I want to upgrade from Oracle 8.1.7 to 9.2.0. How and where can I get some documents about this task, especially about the usage of DBUA tools?
Now, I have Oracle 8i installed and have two databases on it. The $ORACLE_HOME is set to /myoracle/8.1.7 for example.
1) I install Oracle 9i to the new path and let Oracle 8i and 9i coexist in the same server. To make sure the existing software using Oracle 9i other than 8i, the $ORACLE_HOME is changed to /myoracle/9.2.0 after the installation. Now, I run $ORACLE_HOME/bin/dbua to upgrade database from 8i to 9i, but it can't find the old Oracle 8i database. Why? How can I do then?
2) If I only want one Oracle instance in the machine, so I install Oracle 9i to the old 8i path. How can I do in this scenario?