如何在MsSql中添加不存在的列

create view CertAllErrorUserView
as
select
      ID=newid(), --为不实际不存在的唯一列
      DeptID,State,State1,ErrorCount,SubmitDate,
      Rate=convert( decimal(20,0),(ErrorCount*1.0/(select count(1) from mms_Cert where mms_Cert.JDY=CertErrorUserView.JDY))*100),
      AllCount=(select count(1) from mms_Cert where mms_Cert.JDY=CertErrorUserView.JDY)
 from CertErrorUserView