You may be asking yourself "Why PostgreSQL?" There are several choices for open source relational databases out there (we looked at MySQL, MariaDB and Firebird for this article), but what does PostgreSQL have that they don't? PostgreSQL's tag line claims that it's: "The world's most advanced open source database." We'll give you a few reasons why PostgreSQL makes this claim.

https://www.compose.io/articles/what-postgresql-has-over-other-open-source-sql-databases/