S.no Oracle PostgreSQL
1. Mostly aid object-relational database management system open source object-relational database management system
2. The implementation language is C. Implementation language is C and C++.
3. Server operating systems here are OS X, Linux, Windows, z/OS, AIX, and HP-UX. Server operating systems here are HP-UX, NetBSD, Solaris, Windows, Unix, Linux, and FreeBSD.
4. More database productivity Less database productivity
5. Advance security options Good security support but less compared to Oracle
BY Best Interview Question ON 22 Dec 2019