MySQL
MySQL is an open source relational database and one of the most widespread on the web. MySQL is available for most operating systems under a free or commercial license and is the most popular choice provided by web hosting.
When do we use MySQL?
A secure and inexpensive solution.MySQL is the basic choice for web application storage. We are very familiar with this secure system that can be found on almost any web host. This makes MySQL an option that doesn't impact the budget and the perfect choice for applications with a moderate user base or for prototypes, demo applications or initial service releases by startups. It's a safe choice that guarantees good performance and high reliability. Alternatively, you can opt for other types of relational databases, such as: Maria DB or better performing databases like PostgreSQL, and in some cases, you can choose to use non-relational databases instead, such as Mongo DB.