The default port of Mysql is 3306. The MySQL development project has made its source code available under the terms of the GNU General Public License, as well as under a variety of proprietary agreements. MySQL was owned and sponsored by a single forHYPERLINK "http://en.wikipedia.org/wiki/Business" HYPERLINK "http://en.wikipedia.org/wiki/Business"profitfirm, the Swedish company MySQL AB, now owned by Oracle Corporation.
2. PostgreSQL
PostgreSQL, often simply Postgres, is an open source object-relational database management system (ORDBMS) with an emphasis on extensibility and standards compliance. It is released under the PostgreSQL License, a free/open source software license, similar to the MIT License. PostgreSQL is developed by the PostgreSQL Global Development Group, consisting of a handful of volunteers employed and supervised by companies such as Red Hat and EnterpriseDB. It implements the majority of theSQL:2011 standard, is ACID-compliant, is fully transactional (including all DDL statements), has extensible updateable views, data types, operators, index methods, functions, aggregates, procedural languages, and has a large number of extensions written by third parties. PostgreSQL is available for many platforms including Linux, FreeBSD, Solaris, Microsoft Windows and Mac OS X.
The vast majority of Linux distributions have PostgreSQL available in supplied packages. OS X, starting withLion, has PostgreSQL server as its standard default database in the server edition, and PostgreSQL client tools in the desktop edition.
3. SQLite is a relational database management system contained in a small (~350 KB) Cprogramming library. In contrast to other database management