PostgreSQL is a high level relational database management system, that you can use on many different platforms (UNIX, Linux, FreeBSD, OpenSolaris, Windows) and with various scripting languages (Perl, PHP, Python, Java, Ruby). Because it's open-source, it could be effortlessly modified to match the demands of any developer who uses it. PostgreSQL is also among the most efficient and stable database systems, with superior functionality in handling complicated operations when compared with similar systems. It's ideal for large-scale applications due to the fact that a single PostgreSQL database does not have a limit for the size, while an individual table could be up to 32 GB. It isn't a surprise that a number of business, educational and government entities are already using PostgreSQL - Skype, the University of California, Berkeley and the US Department of Labor being just a few examples.