这是SQLServer的注释:
Examples
A. Back up the entire MyNwind database
Note The MyNwind database is shown for illustration only.
This example creates a logical backup device in which a full backup of the MyNwind database is placed.
-- Create a logical backup device for the full MyNwind backup.
USE master
EXEC sp_addumpdevice 'disk', 'MyNwind_1',
DISK ='c:\Program Files\Microsoft SQL Server\MSSQL\BACKUP\MyNwind_1.dat'
-- Back up the full MyNwind database.
BACKUP DATABASE MyNwind TO MyNwind_1