title: How to write regex in Knime Unpivoting node to select columns
body: <p>I am attempting to unpivot COVID-19 data in Knime with the Unpivoting Node. 
  The data available from Johns Hopkins at
  <a href="https://github.com/CSSEGISandData/COVID-19" rel="nofollow noreferrer">https://github.com/CSSEGISandData/COVID-19</a>
  is wide format where each new day of data is added as a new column.</p>
  
  <p>I can <em>manually</em> make the columns with daily data be rows with the <a href="https://nodepit.com/node/org.knime.base.node.preproc.unpivot2.Unpivot2NodeFactory" rel="nofollow noreferrer">Unpivoting</a> Node. However, each day I must reconfigure the node to account for the new column. There are 5 unpivoting nodes in my workflow where this must be done.</p>
  
  <p>The Unpivoting Node has an option to use <em>Regex</em> to detect the columns to include or exclude but I am unable to make it work.</p>
  
  <p>The available columns to include/exclude are a handful of field names such as Province/State, Country/Region, Lat, Long, plus the long list of date columns of the format <code>m/d/yy</code> (or <code>m/dd/yy</code> if later in the month). The Johns Hopkins data for the US is similar format but with additional columns for counties, iso codes, etc.</p>
  
  <p>All of the date columns are this year (i.e. 2020). </p>
  
  <ul>
  <li>For the top part of the Unpivoting node where Value Columns are
  specified, I can do what I need by using the Wildcard setting and the
  pattern  <code>*/*/20</code></li>
  <li>For the bottom part of the Unpivoting node, I need a wildcard or Regex
  expression to specify all the other columns. </li>
  </ul>
  
  <p>All the other columns include alphabet characters. None are of the format m/d/yy.
  Therefore, some sort of Regex that includes any column with alphabetical column names, or specifies NOT <code>m/d/yy</code> should do the trick.</p>
  
  <p>I tried using <a href="https://regexr.com/3f4vo" rel="nofollow noreferrer"><code>[\s\S]+</code></a> for help writing the Regex but nothing seems to work. I appreciate any help.</p>
  
  <p><a href="https://i.stack.imgur.com/RUITq.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/RUITq.jpg" alt="Image is screenshot of unpivot configuration window"></a></p>