In the 10.2.0.3 patch readme it states that I can downgrade the database with some downgrade scripts, then restore the 10.2.0.1 binaries and oracle inventory. However, Oracle support told me I can't do this: 1. restore 10.2.0.1 binaries (oracle home install) 2. restore 10.2.0.1 oraInventory 3. restore my last 10.2.0.1 full backup. so if I upgrade to 10.2.0.3 and something goes wrong and I have to downgrade. Do I have to revert back to my last full 10.2.0.1 backup or can I downgrade the database and thereby not lose data?