title: Entity Framework Core raw SQL issue
body: <p>I have a <code>History</code> table with columns <code>C0, C1, C2, C3, TimeStamp</code>.</p>
  
  <p>I want to select a specific column based on input along with corresponding <code>TimeStamp</code>.</p>
  
  <p>Let <code>channelId</code> be 'C2'</p>
  
  <pre><code>var context = new DalModels.DbContext();
  string command = "SELECT TimeStamp, @channelId FROM dbo.History";
  var user = new SqlParameter("@channelId", channelId);
  var result = context.History.FromSql(command, user).ToList();
  </code></pre>
  
  <p>But instead of a result, I get an exception:</p>
  
  <blockquote>
    <p>No column name was specified for column 2 of 'h'.</p>
    
    <p>Invalid column name 'C0'. </p>
    
    <p>Invalid column name 'C1'. </p>
    
    <p>Invalid column name 'C2'. </p>
    
    <p>Invalid column name 'C3'. </p>
    
    <p>Invalid column name 'TimeStamp'.</p>
  </blockquote>