PostgreSQL is an advanced relational database management system, that you can use on a variety of platforms (UNIX, Linux, FreeBSD, OpenSolaris, Windows) and with many scripting languages (Perl, PHP, Python, Java, Ruby). As it is open-source, it can be easily modified to suit the demands of any developer who uses it. PostgreSQL is also among the most dependable and stable database systems, with better functionality in managing complicated procedures when compared with similar systems. It's appropriate for large-scale apps since a single PostgreSQL database doesn't have a limit for the size, while a single table can be up to 32 Gigabytes. It is not a surprise that a number of business, educational and governmental organizations are already using PostgreSQL - Skype, the University of California, Berkeley and the US Department of Labor being only a couple of examples.