Database (referred to herein as db) - an organized collection of data for one or more users, typically in digital form
Database Management Systems DBMS consist of software that operates databases. DBMSs can be categorized in several ways: the db model they support (relational, XML), the type of computer they support, the query language used to access the db, or any performance trade offs that characterize the db.
There are at least 7 types of db: operational, data warehouse, analytical, distributed, end-user, external, and hypermedia.
So far, in my lifetime, I have probably used a distributed db, an end-user, external db, and a hypermedia db.
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