title: MySQL - How to concatenate columns that contain at least one alphabetic character
body: <p>I have a mysql table with 4 varchar columns, in some cases these columns can contain a number. I have to concatenate into a single string only the columns that contain at least one character and ignore the columns containing only numbers.</p>
  
  <p>example</p>
  
  <p><strong><em>aa + 88 + po + a4</em></strong> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;will result&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <strong><em>aapoa4</em></strong>
  <br><br>
  <strong><em>a3a + ww + 11 + ewd</em></strong> &nbsp;&nbsp;&nbsp;&nbsp;will result&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<strong><em>a3awwewd</em></strong></p>