Is it that the procedure described in Oracle documentation is the path organizations usually follow to upgrade/migrate...
their databases? Or is it a customized approach?
Can you point to manuals/documentations on real-life database upgrading/migration?
For your upgrade, I strongly recommend reading this guide until you are familiar with the upgrade process. Each upgrade I have ever done uses the information in this guide for the upgrade process.
For more upgrade advice on SearchOracle, check out Lessons Learned: Upgrading to Oracle 10g and Oracle 11g upgrade veteran offers step-by-step advice.
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