Backend & data
MySQL
The proven open-source database behind WordPress and countless apps.
MySQL is the world's most widely used open-source relational database. It stores structured information, customers, orders, content, bookings, in tables and serves it reliably at speed. It's the database behind WordPress and a huge share of the web. HDC works with MySQL when a client's site or app needs dependable, well-supported data storage, especially on WordPress or established LAMP-stack systems.
Where it shines
- Battle-tested over 25+ years, extremely stable, mature and well understood
- Powers WordPress, so it integrates cleanly with the most common CMS on the web
- Fast for the read-heavy workloads typical of websites and content systems
- Open-source with a vast community, huge documentation and easy hiring pool
- Hosted everywhere, every major host and cloud offers managed MySQL
- Cost-effective, with no licence fees for the core open-source edition
Trade-offs to weigh
- Fewer advanced features than PostgreSQL for complex queries and data types
- Some default behaviours need careful configuration to keep data strictly correct
- Not the right pick for heavy analytical workloads or specialised data needs
What MySQL is
MySQL is an open-source relational database management system, software whose job is to store, organise and retrieve structured information reliably. First released in 1995, it has become the most widely deployed open-source database in the world, sitting quietly behind a huge portion of the websites people use every day.
“Relational” means data is held in tables, rows and columns, like spreadsheets that can reference one another. A customer table links to an orders table; a posts table links to an authors table. MySQL keeps all of this consistent and serves it back quickly when an application asks. It’s the M in the classic LAMP stack (Linux, Apache, MySQL, PHP) and the database that powers WordPress.
How HDC uses MySQL
We work with MySQL primarily where a client’s project already lives in its world, most commonly WordPress and established PHP-based systems. In practice that means:
- Maintaining and tuning the MySQL database behind a WordPress site, where every page, post and setting is stored.
- Indexing tables and adding caching so a content-heavy site returns its data instantly instead of slowing down.
- Connecting custom features, bookings, directories, member areas, to a MySQL database when that’s the natural fit for the hosting environment.
- Pulling structured content out of MySQL at build time to serve fast, static pages on top with a framework like Astro.
- Handling backups, access control and migrations so the data stays safe and the site stays reliable.
Why we apply it
The strongest argument for MySQL is its ubiquity. It’s the default database for WordPress, which still powers a large share of business websites, and it’s supported by virtually every host and cloud platform. When a client’s site already runs on it, working with MySQL is far more sensible than ripping it out, it’s reliable, well documented and free of licence fees.
For the read-heavy workloads that typical websites generate, far more page views than data changes, MySQL is fast and proven. Tuned correctly, it keeps a growing content site responsive without exotic infrastructure, which keeps a client’s running costs sensible.
How MySQL fits our stack
MySQL is the data layer we encounter most when working with existing or WordPress-based projects. It pairs classically with PHP, the language WordPress is built in, and sits beneath a CMS that the client’s team can edit. We can keep that content engine in place while serving the public site fast and static with Astro, hosted and cached on Cloudflare. When a new project needs more advanced data handling than MySQL offers comfortably, we’d reach for PostgreSQL instead, but for the WordPress and LAMP-stack world, MySQL remains the dependable, well-supported choice.
When MySQL isn’t the right tool
We pick the database to fit the job. For a brand-new application that needs advanced query features, strict data types or complex relationships, PostgreSQL is usually the stronger choice. For a project committed to the Microsoft and .NET world, SQL Server fits more naturally. And for a simple brochure site that only needs a contact form, no database is required at all. MySQL is at its best where it already shines: powering WordPress and the many established systems built around it, reliably and affordably.
Worked example
A WordPress site that stays fast as its content grows
Picture a local business with a busy WordPress site, hundreds of pages, blog posts and product entries, all stored in MySQL behind the scenes. Every page, menu and setting lives in that database. When the site starts to feel sluggish, the fix is rarely a rebuild: it's tuning the MySQL database properly, indexing the right tables and adding caching so common queries return instantly. We'd often go a step further and serve the public pages statically on top, so visitors get near-instant loads while MySQL quietly powers the content behind the scenes. The data stays exactly where it is, it just works far harder. (Illustrative, every build is scoped to your goals.)
Better together
How MySQL fits with the rest of our stack
MySQL: your questions answered
What is MySQL used for?
MySQL is a relational database that stores structured information in tables, things like customers, orders, blog posts or bookings. It's the storage engine behind WordPress and a large share of the web, quietly holding the data that websites and applications rely on.
Is MySQL the database behind WordPress?
Yes. Every WordPress site keeps its pages, posts, users, comments and settings in a MySQL (or MariaDB) database. If you run a WordPress site, MySQL is already doing the heavy lifting whether you realise it or not.
Is MySQL better than PostgreSQL?
Neither is universally better, they suit different jobs. MySQL is simpler, ubiquitous and ideal for WordPress and typical read-heavy websites. PostgreSQL offers more advanced features for complex data and queries. We choose based on what the project actually needs.
Why does HDC use MySQL?
Because it's the dependable, universally supported database behind WordPress and many existing client systems. When a project lives in that world, working with MySQL means reliable data storage, easy hosting and no licence costs, and we can tune it to stay fast.
Is MySQL secure and reliable?
It's one of the most proven databases in existence, trusted by some of the largest sites on the web. As with any database, security comes from correct configuration, controlled access and regular backups, all of which we handle as part of a build.
Can MySQL handle my site as it grows?
For the vast majority of business websites and content systems, comfortably. MySQL scales well with proper indexing, caching and tuning. If a project later needs heavier analytics or more advanced data handling, we'd discuss the right path, but most sites never reach that point.
Want MySQL working for your business?
Tell us what you're trying to achieve, we'll show you, honestly, whether it's the right tool and how we'd apply it.
Enquire now