PostgreSQL is a high level relational database control system, that you can use on a variety of platforms (UNIX, Linux, FreeBSD, OpenSolaris, Windows) and with a number of scripting languages (Perl, PHP, Python, Java, Ruby). Since it's open-source, it may be easily modified to suit the demands of any developer who uses it. PostgreSQL is also one of the most dependable and secure database systems, with better efficiency in handling complex procedures compared with similar systems. It's ideal for large-scale applications as a single PostgreSQL database doesn't have a limit for the size, while one table may be up to 32 GB. It isn't surprising that a number of business, educational and governmental entities are already working with PostgreSQL - Skype, the University of California, Berkeley and the US Department of Labor being just a few examples.