title: Combine a column with a text in mysql
body: <p>In a database product_description I have an some empty values for a column named custom_title (vchar). 
  I'd like to update it with the values (vchar) from another one named "name" and a text.
  I tried and return 0:</p>
  
  <pre><code>SELECT name + 'text' AS custom_title 
  FROM product_description 
  where custom_title is NULL
  </code></pre>