Difference between Oracle and PostgreSQL

1. Oracle : Oracle is an American multinational computer technology corporation headquartered in California united states founded by Larry Ellison Bob Oates 1977. Oracle is a relational management system. It is the first database designed for grid computing that provides the most flexible and cost-effective way to manage information and application. It runs a major platform like WINDOW, UNIX, LINUX and MACOS. It will relational database in which data accessed by the user through the application or query language called SQL. Here is Different Edition of oracle are:

• Enterprise Edition
• Standard Edition
• Express Edition
• Oracle Edition

2. PostgreSQL : PostgreSQL is a relational database management system. It is an open-source database active development for over 20 years. It supports all the features of RDBMS that provide open connectivity and runs on major platforms like UNIX, MACOS, WINDOW, LINUX etc. It also supports video text audio images programming interface in various programming language C, C++, JAVA, PYTHON, PERL etc. It also knows as POSTGRES.
Difference between Oracle and PostgreSQL :

Basis of	Oracle	PostgreSQL
Definition	Oracle is a relational management system.It is first database designed for grid computing.	PostgreSQL is free open source relational-database management system emphasizing extensibility and SQL compliance.
Development	Oracle developed by Larry Ellison and Bob in 16 june 1977.	PostgreSQL developed by PostgreSQL global Development group in 8 july 1996.
Written in	Oracle written in c and C++ language.	PostgreSQL written in C language.
Latest version	Oracle runs on 19c version which release on February 2019.	PostgreSQL runs on PostgreSQL 12.3 version which release on may 2020.
License	Oracle required license.	PostgreSQL is open source.
Support	Oracle support cost based.	PostgreSQL provide free support or option with paid support at low cost.
Security	Oracle is more secure than PostgreSQL.	PostgreSQL provide good security but it is not secure as Oracle.
Programming language	Oracle support various language like C, C++, JAVA, PERL, .NET, JAVA SCRIPT, PHP etc.	PostgreSQL support C, C++, JAVA, PERL, SCALA, PHP, C#, COBOL, JAVA SCRIPT etc.
Features.	Availability. Fast-Start Failover to Standby Database. Business Intelligence. SQL Support for Analytic Applications. Clustering. Real Application Clusters (RAC) Performance. Content Management. Database Overall. Database Security. Grid Computing.	Complex SQL queries. SQL Sub-selects. Foreign keys. Trigger. Views. Transactions. Multi version concurrency control (MVCC)