sql server 断开所有连接

DECLARE @sql VARCHAR(4000)  
SET @sql= ''  
SELECT @sql = @sql + ' kill  ' + CAST(spid AS VARCHAR) + CHAR(13)  
FROM master.sys.sysprocesses WHERE dbid = db_id( 'CMDK_DEV')  
EXEC(@sql)  
 
EXEC sp_executesql @sql