# Databases

A (Relational) Database Management System of the following types:

- SAP HANA

- SAP ASE (also referred to as SAP Sybase ASE)

- SAP IQ

- SAP SQL Anywhere

- SAP MaxDB (also referred to as SAP DB)

- Microsoft SQL Server (also referred to as MSSQL server)

- IBM DB2

- Oracle

- PostgreSQL

- MySQL and MariaDB

This can either be a stand-alone Database or a database instance of an SAP System‚ or a liveCache, etc.

A Database is hosted by exactly one Physical Server or Virtual Cluster Server, but multiple Databases can be hosted on the same server.

If you want to manage or monitor a Database, you need to manage or monitor the Physical Server or the Virtual Cluster Server the Database is hosted on.

From a license perspective, it depends if a Database is the primary Database of an SAP System or not. If yes, the license is included in the SAP System’s license. If not, a separate Database license is required. The only exception is the System DB of an SAP HANA database which does not consume a license.