Which database do you usually prefer? Is it MySQL’s flexible structure, or PostgreSQL because of its performance-focused approach? Or do you use something else? Could you share why you chose it?
Which database do you prefer for PHP projects?
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Thank you! I usually use MySQL because it's easy to work with for simple projects and has a lot of documentation. Which databases do you prefer for which projects?
MySQL is usually my first choice, especially for performance-focused projects. When I used to work on WordPress-based projects, I was quite satisfied with its performance—it's easy to set up, and most teams are already familiar with it. Whenever I needed to quickly build something, I always turned to MySQL because even with its built-in tools, you can easily manipulate data.
But lately, I’ve started exploring PostgreSQL more. For projects that require complex queries, PostgreSQL’s flexibility and data type support really shine. Being able to store and query JSON data directly in the database is a huge plus. I used PostgreSQL in one project, and the query performance was significantly better than MySQL, though the learning curve is a bit steeper. At the end of the day, both have their pros and cons, and I choose based on the project’s needs.
I'm using MariaDB—fully compatible with MySQL but with better performance and features. It's a good fit for my projects because I usually prefer simplicity and strong community support.
For most PHP projects, I usually go with PostgreSQL—not because MySQL is bad, but because of its more robust features. JSON/JSONB data types, better transaction isolation, and extensibility (e.g., PostGIS for geospatial data) make it indispensable for complex applications. Additionally, Active Record integration in frameworks like Laravel often feels more stable with PostgreSQL, especially when dealing with large datasets.
While MySQL has the advantage of easy setup and high compatibility, PostgreSQL has been catching up quickly thanks to modern replication methods (like logical replication) and efficient indexing strategies. For simple CRUD applications, the choice might not matter much, but with analytical queries or high write loads, the difference becomes clear.
Sometimes, I also use MariaDB—a drop-in replacement for MySQL with better default security settings. For highly scalable microservices, MongoDB (NoSQL) often comes into play when schema flexibility outweighs ACID compliance. Ultimately, it depends on the use case, but PostgreSQL is my default for most projects.
I usually go for MySQL/MariaDB in most WordPress projects, especially because it comes integrated with the CMS and optimizing it for high-traffic environments (like the 50 I'm currently managing) is easier. For smaller projects or when I need a cleaner structure, PostgreSQL has saved me a few times, especially when working with apps that required geospatial operations or complex data analysis.
But let me tell you about a recent case: a client had a booking website with WooCommerce + a custom plugin to manage stock for very specific products. We started with MySQL, but as bookings and real-time calculations grew, the *joins* became a bottleneck. We switched to PostgreSQL and wow, what a difference: queries sped up by 40% and we could add features like triggers for automatic validations without issues. That said, the migration required some code adjustments (the client was using MySQL-specific functions), but it was worth it. For new projects, I now do a quick benchmark: if simplicity and compatibility (WordPress, plugins) are key, MySQL. If advanced needs or future scalability are a priority, PostgreSQL.