use master 
go
sp_configure  ‘allow updates‘,1
go
reconfigure with override

update sysdatabases set status=32768 where dbid=DB_ID(‘ypsxyy20160527‘)


dbcc rebuild_log
(‘ypsxyy20160527‘,‘D:\亚讯医药软件20160526\YpsxYY.ldf‘)


exec   sp_dboption   ‘ypsxyy20160527‘,   ‘single user‘,   ‘false‘

update sysdatabases set status =28 where name=‘ypsxyy20160527‘

ALTER DATABASE ypsxyy20160527 SET SINGLE_USER  ----???????????


DBCC CheckDB (ypsxyy20160527,REPAIR_ALLOW_DATA_LOSS)   ----?????

DBCC CheckDB (ypsxyy20160527),REPAIR_REBUILD)  ----??

ALTER DATABASE ypsxyy20160527  SET MULTI_USER   ----?????

 alter database ypsxyy20160527 set EMERGENCY
 alter database ypsxyy20160527 set online