--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