title: Display value from column B if column A is NULL
body: <p>I am wondering how i can display data from column B if Column A is null. The reason is if we get a product from one of our manufactures it is put in a different column. However, when i go to build the report the two columns essentially the same thing and it is throwing the graph way off. Any help would be appreciated. </p>
  
  <p>Something like this maybe? </p>
  
  <pre><code>Case When column A isnull then column B?
  </code></pre>