PostgreSQL is an advanced relational database management system, that you can use on numerous platforms (UNIX, Linux, FreeBSD, OpenSolaris, Windows) and with various scripting languages (Perl, PHP, Python, Java, Ruby). Because it is open-source, it may be effortlessly modified to suit the demands of any developer who works with it. PostgreSQL is also one of the most efficient and secure database systems, with much better performance in handling sophisticated procedures compared to similar systems. It's suitable for large-scale applications as a single PostgreSQL database does not have a limit for the size, while an individual table may be up to 32 GB. It's not a surprise that lots of business, academic and governmental organizations are already working with PostgreSQL - Skype, the University of California, Berkeley and the US Department of Labor being a few examples.