Immediately stops SQL Server.
Unless the WITHNOWAIT option is used, SHUTDOWN shuts down SQL Server by:
Disabling logins (except for members of the sysadmin and serveradmin fixed server roles).
To display a list of all current users, run sp_who.
Waiting for currently running Transact-SQL statements or stored procedures to finish. To display a list of all active processes and locks, run sp_who and sp_lock, respectively.
Inserting a checkpoint in every database.
Using the SHUTDOWN statement minimizes the amount of automatic recovery work needed when members of the sysadmin fixed server role restart SQL Server.
Other tools and methods can also be used to stop SQL Server. Each of these issues a checkpoint in all databases. You can flush committed data from the data cache and stop the server:
By using SQL Server Configuration Manager.
By running net stop mssqlserver from a command prompt for a default instance, or by running net stop mssql$instancename from a command prompt for a named instance.
By using Services in Control Panel.
If sqlservr.exe was started from the command prompt, pressing CTRL+C shuts down SQL Server. However, pressing CTRL+C does not insert a checkpoint.
Using any of these methods to stop SQL Server sends the SERVICE_CONTROL_STOP message to SQL Server.