Postgres SQL is one of the open source Database Management Systems which is an amazing one. While there are many pros and cons of PostgresSQL over Oracle MySQL, PostgresSQL is definitely going to save a lot of time in terms of efficiency gains that you will do.

For example - Importing CSV file is easy in PostgresSQL and often if you will try importing CSV file to MySQL through Musqlworkbench, the entire data isn't imported in multiple attempts even after trying fixing the source files multiple times. PostgresSQL imports them without any issue.