title: update column and update another col from updated col
body: <p>Is this a workable solution?</p>
  
  <pre><code>BEGIN
  
   UPDATE my_table 
   SET my_column = my_value
   WHERE my_conditions,
         my_column2 = my_column --my_updated_column_value
  
  COMMIT;
  END;
  </code></pre>
  
  <p>Or how can I update multiple columns with the same value? </p>