Database stores data and the data is managed by the database specified model. The most common form of a database system is a relational database system. Database is one the most common wrongly used terminology by the layman. Basically, there is clear confusion between binary files stored on non interactive storage system and served on browser on GET request, like a HTML webpage is served from any FTP server. Only Apache like web server with proper setup is enough to serve so. No Database and Database System is required to process, store such ‘data’. In the same way, a simple PHP webpage will not require any Database and Database System, PHP is a server side programing language, in such case, along with Apache like web server software, PHP is required to be installed on the server to serve the webpage. In both cases, the actual page is physically present on the FTP server.
Please read more – Database and Database System (DBS)