MySQL

MySQL is easily one of the most widely used relational database management systems on the web. Like most of the tools we use, MySQL is free and open-source, and is mature from decades of development. Many of the world's biggest web companies use MySQL as one of their cornerstone technologies, companies including Google, Facebook, Wikipedia, Yahoo and Twitter. All of the content management systems and frameworks that we use are tightly integrated with MySQL. We also design and build web applications from scratch, and in such cases MySQL is what we have the most experience with and is our database of choice. For database design we like to use MySQL Workbench, and we have a lot of experience with normalization techniques, relationship tables, audit tables, building indexes, writing complex queries, etc.