PostgreSQL vs MySQL vs MariaDB: Which Database Fits Your Needs?

Discover how you should go about choosing between the three popular open source relational database management systems - PostgreSQL, MySQL and MariaDB.

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In the ever-evolving world of software development, data lies at the heart of every application.

Whether you're building a high-traffic e-commerce platform, a lightweight web app, or an enterprise-level analytics engine, your choice of database can make or break your project. Among the multitude of options, three names dominate the open source relational database landscape: PostgreSQL, MySQL, and MariaDB. Each of these RDBMS (relational database management systems) has carved out a loyal user base and distinct identity, offering a mix of speed, reliability, extensibility, and community support.

The story of open source databases begins with the need for freedom — freedom from vendor lock-in, freedom to customise, and freedom to innovate. While commercial databases like Oracle and SQL Server once ruled the enterprise world, developers around the globe began to shift towards more flexible and cost-effective alternatives.

MySQL, created in 1995, quickly became a favourite due to its simplicity, performance, and ease of integration with the LAMP stack. PostgreSQL, although older (dating back to the 1980s as the ‘POSTGRES’ project), steadily gained traction for its advanced features and standards compliance.

Enter MariaDB — born out of concern when Oracle acquired Sun Microsystems (and with it, MySQL) in 2010. Michael ‘Monty’ Widenius, one of MySQL’s original creators, forked the project to ensure that the community retained full control and transparency.

This sparked a new era of competition and innovation in the open source database world, giving rise to three strong contenders - each with its own philosophy, community, and technical direction.

PostgreSQL is often dubbed the “world’s most advanced open source database.” Known for its powerful support for complex queries, full ACID compliance, and standards-based architecture, PostgreSQL is the go-to choice for applications where data integrity and extensibility are paramount