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A database is a collection of data or information. Database management
system (DBMS) is a program that manages data in a database. A database
could be as simple as a phone book or stock tables, or as sophisticated as a
biological repository with terabytes of data.
Relational DBMSs are those that follow the relational data model described
by E. D. Codd. Object-oriented databases refer to those that store objects
directly, or use mapping technology to store objects instead of simple