Why do we need master database?

Question

The master database is one of 4 visible system databases with model, msdb, and tempDB being the other 3. Its purpose is to store the list of server level settings, like those from sp_configure, and server level metadata, like server logins/passwords and linked servers.

What is the purpose of the master database?

The master database records all the system-level information for a SQL Server system. This includes instance-wide metadata such as logon accounts, endpoints, linked servers, and system configuration settings.

Why do we need model database?

The model database is used as the template for all databases created on an instance of SQL Server. Because tempdb is created every time SQL Server is started, the model database must always exist on a SQL Server system.

What is stored only in the master database?

Explanation: Server-scoped Dynamic Management View is stored only in the Master database.

How do I create a master database?

To create a Master Data Services database1Open Master Data Services Configuration Manager.2In the left pane, click Database Configuration.3On the Database Configuration page, click Create Database.4Complete the Create Database wizard to create and configure the database.Create a Master Data Services Database - SQL - Microsoft Docs

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