--下面语句中的ABCD就是你要修改的数据库名称
USE MASTER
GO
SP_CONFIGURE \'ALLOW UPDATES\',1
GO
RECONFIGURE WITH OVERRIDE
GO
update sysdatabases set status =32768 where name=\'ABCD\'
Go
sp_dboption \'ABCD\',\'single user\',\'true\'
Go
DBCC CHECKDB(\'ABCD\')
Go
update sysdatabases set status =28
where name=\'ABCD\'
Go
sp_configure \'allow updates\', 0 reconfigure with override
Go
sp_dboption \'ABCD\', \'single user\', \'false\'
Go