Database management systems (DBMSs) are software applications that allow companies to administrate large databases of information. The most popular among these DBMSs are Oracle, MySQL, and Microsoft SQL Server. Oracle controls around 46 percent of the commercial database market worldwide, making it one of the biggest brands in the industry. The market for commercial databases has been shrinking since around 2015, and is expected to fall to 22 billion U.S. Dollars by 2021. With these massive stores of information comes a crucial need for data security. Database security market had a market value of 2.57 billion U.S. dollars in 2016 and is projected to grow to about seven billion U.S. dollars by 2022. Database encryption revenues are also increasing drastically, with market size expected to increase from 335 billion U.S. dollars to 1.6 trillion between 2015 and 2022.
As of January 2018, around 59 percent of software developers worldwide work with MySQL databases, while about 41 percent of developers work with Microsoft SQL Server databases, making these the two most widely used database technologies around the globe. The most sought-after database skills among software developers worldwide include MongoDB and Elasticsearch. MySQL and Microsoft SQL Server are also the most widely used relational databases among data scientists, meaning that they play an important role in both business and academia. Many DBMSs are free, open-source technologies, but large companies such as Microsoft, Oracle, and IBM also play a role in shaping the industry.