19c may also be deployed on Oracle Engineered Systems (e.g. Exadata) on-prem, on Oracle (public) Cloud or (private) Cloud at Customer.
Some (imho) interesting new features
json_mergepatch applies one or more changes to multiple
JSON documents with a single statement.
SQL Quarantine
Hybrid partitioned tables which extend Oracle partitioning.
Automated installation, configuration and patching
DBCA commands
createDuplicateDB,
relocatePDB,
createFromRemotePDB.