Software that interacts with end users, applications, and the database itself to capture and analyze data.

Encompasses the core facilities provided to administer the database.

Provides a database engine to create, read, update and delete (CRUD) data from a database.

Classification

Relational DBMS (RDBMS)

Model data as rows and columns in a series of tables

Use the structured query language (SQL)

NoSQL

Key-value store, object database, document store, graph database, ...