Unanswered: Downgrading from Oracle 9.2 to oracle 220.127.116.11
We have a situation where we need to downgrade our database from oracle 9i to oracle 18.104.22.168.
I need to clarify whether in Oracle 22.214.171.124 the following features are compatable or not
1) Global temporary tables
2) Primary Keys supported by non unique indexes
3) Alter table exchange partition
4) Snapshots/Materialized views