title: CQL select specific columns
body: <p>For the following <code>Cassandra</code> schema:</p>
  
  <pre><code>CREATE TABLE periods (
  period_name text,
  event_name text,
  event_date timestamp,
  weak_race text,
  strong_race text,
  PRIMARY KEY (period_name, event_name, event_date)
  );
  </code></pre>
  
  <p>Usually the <code>select</code> statement can be like:</p>
  
  <pre><code>SELECT * FROM ruling_stewards
  WHERE king = 'Brego'
  AND reign_start &gt;= 2450
  AND reign_start &lt; 2500 ALLOW FILTERING;
  </code></pre>
  
  <p>But is there a way to select the specific columns without giving a relation? For example, to show all the <code>event_name</code> and <code>period_name</code> columns? (do not show other unmentioned columns).</p>