title: Filter container on column name
body: <p>Below is <code>COLLECTION (DATA)</code> format:</p>
  
  <pre><code>Column A    Column B.     Column C
  AAAA.       1234.         54
  AAAA.       5678.         56
  AAAA.       1234.         46
  </code></pre>
  
  <p>I need to loop through the container and sum up <code>COLUMN C</code> for matching <code>COLUMN B</code>.</p>
  
  <p>The filter container is not working:</p>
  
  <pre><code>"[DATA] = COLUMN B"
  </code></pre>
  
  <p>I cannot put the filter condition on text, e.g.:</p>
  
  <pre><code>"[DATA] = '2234.'"
  </code></pre>
  
  <p>Also tried without double quotes:</p>
  
  <pre><code>[DATA] = COLUMN B
  </code></pre>
  
  <p>Is there a possible way of filtering on column name?</p>