Restoration after a minor update of RDS

Is it possible to restore a minor version upgrade according to the RDS recommendation to the state before theversion upgrade by “a simple method such as button operation”?

Also, I think that there is another method other than the above, such as automatic backup of the instance andrestoration . In that case, is it possible to restore the version as well?

Answer:

Is it possible to restore a minor version upgrade according to the RDS recommendation tothe state before the version upgrade by “a simple method such as button operation”?

No. Downgrade is not supported.

Reference:

Oracle DB Engine Upgrade-Amazon Relational Database Service

https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_UpgradeDBInstance.Oracle.Minor.html

RDS for Oracle doesn’t support minor version downgrades.

Also, I think that there is another method other than the above, such as automatic backup of the instance and restoration from the created snapshot. In that case, is it possible to restore the version as well?

It is necessary to restore the snapshot taken before the version upgrade and create a new instance.

Downgrade is not supported for snapshots.

Restore Snapshot from DB –Amazon Relational Database Service

https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_RestoreFromSnapshot.html

You can’t restore from a DB snapshot to an existing DB instance; a new DB instance is created when you restore.