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Vettabase Blog: A Hub of Articles on MySQL, MariaDB, PostgreSQL and Cassandra
We at Vettabase are advocates of open source software and mindset. Our team believes in transparency, knowledge sharing and professional discussions (though we had to enable moderation for commentaries to avoid spam). We appreciate sharing and quoting our blog posts, but please always refer to Vettabase and the author.
When indexes make SQL queries slower
During our SQL optimisation training courses, I always stress the need of understanding how databases run SQL queries internally. Which is easier and more intuitive than you’d think, anyway. But if you overlook this aspect, there is always a risk of sticking to simple solutions, and consider them universal even
Announcing the Database Frontiers Virtual Conference!
Hey database enthusiasts! We’re excited to announce Database Frontiers, a free virtual conference co-organised by Vettabase and BreachDirectory.com, happening on 15th October 2025. Database Frontiers is bringing together brilliant minds from across the database world to explore multiple technologies and platforms – not just one product. Our lineup features top-notch
MariaDB SEQUENCE: a Simple Approach to Synthetic Data
MariaDB SEQUENCE is a storage engine that generates a sequence of positive integer numbers. However, in this article I will show you that it’s easy to use SEQUENCE to generate more complex sequences, that are not necessarily numeric. This is a very convenient way to generate relatively simple synthetic data.
Stored Procedures in MariaDB: Smarter, Easier and More Powerful
MariaDB supports stored procedures written in procedural SQL. Which essentially means “SQL with IF’s and loops”. Most DBMSs do the same, but every project supports different, incompatible syntaxes. MariaDB implemented Oracle’s dialect, called PL/SQL. The base of the current procedural language was implemented in MySQL, before MariaDB existed. As far
The EXPLAIN command and its variants in MariaDB and MySQL
For a very long time, the EXPLAIN command remained the same in the MariaDB and MySQL world. It was good enough in most cases, but the community welcomed the implementation of extensions and variants. However, MariaDB and MySQL improved it in different ways. So, if you’re familiar with one of
MariaDB and the GROUP BY error
Developers who are not familiar with SQL are often confused by MariaDB and MySQL’s infamous GROUP BY error. From time to time, customers ask us to explain it, so it’s time we publish an article on this topic. The error I’m talking about is the following: Let’s see what this
Tuning MariaDB timeouts that affect applications
MariaDB has many configurable timeouts. Some of them can only be configured by DBAs (database administrators). Others can be adjusted by developers in the application code, though DBAs can configure defaults. MariaDB timeouts can be grouped in these categories: But why would one change the default timeouts? Isn’t it dangerous?
Dolt database: first impressions
You might know that we maintain a list of Awesome Innovative Databases on GitHub. At the time of this writing, the first item in the list of active projects is curious: Dolt. If English isn’t your mother tongue, you might not know that it is a synonymous for idiot or…
A Review of 2024 in the Database World
It’s January 2025, so it’s a good time to look back, and write my thoughts on the most important events and trends of 2024 in the database world. Would you like to share your thoughts? I’d be happy to read your comments. How does MariaDB compare to MySQL? MariaDB Foundation
The Mystery of ProxySQL Galera Writer Switchover!
Writer switchover issues with ProxySQL and Galera can feel like an unsolved puzzle. Recently, I encountered two strange behaviors that revealed underlying issues in how ProxySQL interacts with Galera clusters. In this post, I’ll walk through the unexpected behaviors I faced, and the troubleshooting approaches that helped me address these
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Professional help for your database infrastructure is just one click away! Use our contact form to explain your recent and (or) critical database issues to us. Your message will remain strictly confidential to the Vettabase team. Our experts will respond to you as soon as possible. You can also book a meeting with Federico Razzoli, the Director and Founder of Vettabase Ltd.
We at Vettabase respect our customers and offer good value for money compared to many other database consulting companies. We automate things where others leave them as they are because it means more support incidents or consulting engagements. Unlike many other companies, we will not recommend you a solution we are interested in. Quite the opposite, we will remain unbiased and use the best tools and technologies that fit your existing infrastructure, plans for growth and budget.