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Of all the databases, the master database is the most important as it is necessary for starting the SQL Server.

Master Database is the core system database that contains all the system-level information of SQL Server. SQL Server mainly contains the below-listed system databases:Įach of them is used by SQL Server for Separate purposes. In this blog, you’ll learn about all the system databases and their purposes. User databases can store and access the data of an application for which they are being used.These are the databases that users use while creating applications User-defined databases are created and managed by the users.System databases are used to manage SQL Server and contain information about the SQL Server system like logins, databases, linked servers, jobs, schedules, reports, etc.System databases are the databases that are installed during the SQL Server installation and are used to manage SQL Server.