---备份
BACKUP DATABASE wk
TO DISK ='d:databasemydb.BAK'
--还原
USE master
RESTORE DATABASE wk
FROM DISK='d:databasemydb.BAK'
WITH REPLACE
TO DISK ='d:databasemydb.BAK'
--还原
USE master
RESTORE DATABASE wk
FROM DISK='d:databasemydb.BAK'
WITH REPLACE