1.1.4 Testing the Migration on a Representative Subset of the Existing 11g System

Oracle recommends that you migrate sample data from the 11g system to the 12c system before performing the actual migration to ensure a smooth transition.

To migrate sample data, refer to the migration procedure described in this guide. Testing the migration by migrating a representative subset of the data can help you to:
  • Verify more quickly that the migration of the data from the existing 11g system is likely to be successful
  • Explore in detail the differences between the existing 11g system and the new 12c system


The 11g system is left unchanged during and after the migration process is complete.

Use the test plan that you previously created to verify that the sample migration process is successfully and that the resulting system has your data.