MySQL has grown in widespread popularity due to its effective use being a relational database and its ability to immediately build fast, powerful and secure data storage systems.
Its programming syntax and interfaces are also very similar to other popular query languages and structured data stores like Oracle. And most importantly it is open-source.
At Sidstar we have used MySQL storage for various bespoke projects for small and medium companies. Its availability with almost every hosting server makes it the number one choice when it comes to cloud based software development.