设置SQL别名值

Question

是否有办法通过检查其他列或者例如来设置别名isApprover的值（如果Control.ApproverID或Process.TApprover有值，则将别名设置为true值）

以下是两列：

cast(case 
        when max(isnull(Process.TApprover,0)) = :MemberId 
           then 1 
           else 0 
     end as bit) as isApprover,

cast(case 
        when max(isnull(Control.ApproverID,0)) = :MemberId 
           then 1 
           else 0 
     end as bit) as isApprover,