PostgreSQL is an innovative relational database management system, that you can use on many platforms (UNIX, Linux, FreeBSD, OpenSolaris, Windows) and with various scripting languages (Perl, PHP, Python, Java, Ruby). Due to the fact that it is open-source, it may be freely modified to match the demands of any developer who employs it. PostgreSQL is also one of the most efficient and secure database systems, with much better performance in handling complicated procedures compared with similar systems. It's suitable for large-scale apps as a single PostgreSQL database does not have a limit for the size, while one table may be up to 32 GB. It is not surprising that a number of business, educational and government entities are already employing PostgreSQL - Skype, the University of California, Berkeley and the US Department of Labor being just a few examples.