实例讲解MSDB数据库置疑状态的解决方法

USE MASTER
GO

SP_CONFIGURE 'ALLOW UPDATES',1 
RECONFIGURE WITH OVERRIDE
GO

UPDATE SYSDATABASES SET STATUS =32768 WHERE NAME='msdb'
Go

sp_dboption 'msdb', 'single user', 'true'
Go

DBCC CHECKDB('msdb') 
Go

update sysdatabases set status =28 where name='msdb'
Go

sp_configure 'allow updates', 0 

reconfigure with override
Go 

sp_dboption 'msdb', 'single user', 'false'
Go