You can choose one of these options depending on the amount of data you want to migrate, downtime requirements during the migration, network bandwidth between your source database and your Oracle Cloud Infrastructure region, and whether you want manual control over the migration.

• Migration Prerequisites
  Before starting your migration, it is recommended to run the Cloud Premigration Advisor Tool (CPAT), which helps you evaluate your source database for compatibility with the Autonomous Database.
• Recommended Migration Methods
  Following are the recommended migration methods to migrate your database into an Autonomous Database.
• Migrate Existing SQL Execution Plans to Autonomous Database to Mitigate the Risk of SQL Performance Regressions
  Describes how to reduce the risk of SQL performance regressions when you migrate to Autonomous Database.