The system database contains information/metadata for all database present on an SQL Server instance. The system database stores information regarding logins, configuration settings, connected servers etc. It also holds various extended stored procedures to ACCESS external processes and applications.

Major system databases:

• Master: Core system database to mange Sql Server instance.
• RESOURCE: Responsible for physically storing all system objects.
• TempDB: This is a temporary database used to store temporary, tables, cursors, indexes, variables etc.
• Model: This acts as a template database for all user created databases.
• MSDB: Database to manage SQL Server agent configurations.
• Distribution: Database primarily used for SQL Server REPLICATION.
• Report Server: Main database for reporting services to store metadata and other object definitions.
• ReportServerTempDB: Acts as a temporary storage for reporting services.

The system database contains information/metadata for all database present on an SQL Server instance. The system database stores information regarding logins, configuration settings, connected servers etc. It also holds various extended stored procedures to access external processes and applications.

Major system databases: