Query automatically generated Guid column

--newid () can automatically generate columns at query time Guid

select   top   10   *,newid()   as   Random   from   ywle where   ywlename='001'   ordey   by   Random       

- Create the corresponding column with the uniqueidentifier type

IF NOT EXISTS (
        SELECT *
        FROM dbo.SysObjects
        WHERE ID = object_id(N'[RMA_ExchangeOrderAddTempInfo]')
            AND OBJECTPROPERTY(ID, 'IsTable') = 1
        )
BEGIN

SET ANSI_NULLS ON

SET QUOTED_IDENTIFIER ON

CREATE TABLE [dbo].[RMA_ExchangeOrderAddTempInfo](
    [Id] [int] IDENTITY(1,1) NOT NULL,
    RandNum uniqueidentifier  NULL,
    )
END

GO

        ///  <Summary> 
        /// random number as a primary key (received and transmitted in the background with reference Guid type)
         ///  </ Summary> 
        public Guid randnum { GET ; SET ;}