title: Oracle apex interactive grid: add a calculated column not binded to the table
body: <p>I have an interactive grid in apex, all column are linked to a database column and all works fine. But I want to have another column with extra info and NOT linked to a database column. I can't figure how to do that and if it's possible.</p>
  
  <p>Case: I have a date column, but I also want a column with the operational year. Something like that.</p>
  
  <pre><code>Year   | Date  
  -------|------------
  2020   | 2020-05-05
  2020   | 2020-01-25
  2019   | 2019-08-12
  2018   | 2020-07-11
  </code></pre>
  
  <p>The year is only as reference and I don't want to save it. In an interactive report it would be easy as adding it to the sql query, but in a grid it's another thing...</p>