Free Linux Relational Databases

Basically, relational databases store and manage data in a table format. The table has each piece of data organized into a row and a column where columns hold the data of a single type or field, like first name, order number, or the image link of a product logo, etc. and rows create a relationship within these data points.

For example, rows can associate the first name to the last name and then to a user name, email address, and customer ID. Generally, organizations use these databases to maintain the data from their applications and make sure that they always have access to important customer information, product data, social data, and financial particulars like purchases, fulfillment, revenue, and expenses. Those who are looking for a relational database solution with little budget also have free database software options.

Let’s take a look at some of the Free Linux Relational Databases available in the market with their features. Following is the list of freely available Linux databases:


This is a great free and open source option optimized specifically for web applications. It is useful when complex web services process large amounts of data and generate many concurrent requests. It is written in the C programming language.


  • Online backup
  • GUI tools and drivers for development languages: JDBC, PHP, Python, Perl, and Ruby, etc.
  • Auto-failover feature with 24/7 online web service
  • Large systems divide data over multiple database instances


This Relational database offers many ANSI SQL features. It supports Linux, Windows, and various Unix platforms as well.


  • Trace API for real-time monitoring
  • Windows-trusted authentication
  • Variety of development tools available.
  • Free support through its large global community


MongoDB was founded in 2007 and is a “database for giant ideas”. It has been downloaded 20 million times and is supported by more than 1,000 partners.


  • Document validation
  • Commonly used for Mobile apps, Product catalogs, and Content management systems
  • Real-time apps with in-memory storage engine
  • Reduces time between primary failure and recovery


This is another excellent open source option, running on all major operating systems, such as Linux, UNIX (AIX, BSD, HP-UX, SGI IRIX, Mac OS X, Solaris, Tru64), and Windows.


  • Create custom data types and query methods
  • The Framework enables the definition and creation of own custom data types
  • Runs stored procedures various programming languages: Java, Perl, Python, Ruby, Tcl, C/C++, and its own PL/pgSQL etc.
  • GiST (Generalized Search Tree) system Brings together different sorting and searching algorithms: B-tree, B+-tree, R-tree, partial sum trees, and ranked B+-trees etc.

Thank you for reading this article. Hope it is useful for the one who is looking for new options in freely available Linux relational databases.