We use MySQL at my organization to store the data, analyze and find insights. It helps make business easier by letting you store huge amounts of data, with easy quarrying and accessing, compatibility and analytics tools.
Frankly, there is not much difference between MySQL, GoogleSQL, Dremel SQL, SQL, etc. The main differences would be the syntax and pricing. MySQL has a free version, and it includes loads of important features, which were good enough for my company. The User Interface was also good. Hence, we decided to use MySQL.
This would be a great fit for startups since it is free to use and very easy to use. It changes the way you do business by allowing you to store the data online and letting you access it from anywhere. I have used the free version at a medium scaled company.