PostgreSQL is an open source, object-oriented relational database system. It supports many advanced features and complies with the ANSI-SQL standard. It has won industry recognition and user appreciation. The PostgreSQL slogan The world's most advanced open source database
 reflects the sophistication of the PostgreSQL features. It is a result of many years of research and collaboration between academia and industry. Start-up companies often favor PostgreSQL due to licensing costs and it can aid profitable business models. PostgreSQL is also favored by many developers because of its capabilities and advantages.
PostgreSQL can be used for OLTP and OLAP applications. It is ACID compliant; thus, it can be used out of the box for OLTP applications. For OLAP applications, PostgreSQL supports the Windows functions, FDW, and table inheritance. Also, there are many external...
