If SQL Server Enterprise Manager or SQL Server Service Manager is not available, you can stop Microsoft® SQL Server™ by issuing a SHUTDOWN command from osql or another query tool.
The SHUTDOWN statement minimizes automatic recovery time when you restart SQL Server. The SHUTDOWN statement stops SQL Server in this manner:
Note Issuing the SHUTDOWN WITH NOWAIT statement stops the server immediately. However, it requires more recovery time the next time the server is started because no CHECKPOINT is issued against any databases.
To stop SQL Server immediately