- query hints
- planner hints
- better statistics (including ways to manually create statistics)
- no vacuum
- automatic planner adjustment when true cost was off
- better planning for prepared statements
- active-active clustering with RAC
- vendor support for running on SAN including snapshots
- usable query analysis tools provided by the vendor (pg_stat_statements alone doesn't cut it)
- datapump much faster than pg_dump
- better connection management
- out of the box backup tooling
edit: I haven't used Oracle in 4 years, all of that was available to me back then.
- planner hints
- better statistics (including ways to manually create statistics)
- no vacuum
- automatic planner adjustment when true cost was off
- better planning for prepared statements
- active-active clustering with RAC
- vendor support for running on SAN including snapshots
- usable query analysis tools provided by the vendor (pg_stat_statements alone doesn't cut it)
- datapump much faster than pg_dump
- better connection management
- out of the box backup tooling
edit: I haven't used Oracle in 4 years, all of that was available to me back then.