--EXEC sp_addlinkedserver 
--   @server = 'PSHGQ'
--GO
--select * from sys.servers
--EXEC sp_dropserver 'PSHGQ'
--EXEC sp_addserver 'SUGON', local
--select @@servername
--select serverproperty('servername')  



use [数据库]    
go    
select @@servername  
select serverproperty('servername')  
go
------  
IF serverproperty('servername')<>@@servername    
BEGIN  
DECLARE @server SYSNAME  
SET @server=@@servername      
EXEC sp_dropserver @server=@server    
SET @server=cast(serverproperty('servername') AS SYSNAME)   
EXEC sp_addserver @server=@server,@local='LOCAL'     
END  
ELSE  
PRINT '实例名与主机名一致，无需修改！'