title: Concise way of querying many identical files
body: <p>Is there a concise way of writing one query to run the equivalent of the following queries on 40 identical files:</p>
  
  <pre><code>SELECT * FROM file1                       
  where created &gt; '2017-03-01-00.00.00.000000'
  and regDate &lt; 20170101
  
  SELECT * FROM file2                       
  where created &gt; '2017-03-01-00.00.00.000000'
  and regDate &lt; 20170101
  
  .
  .
  .
  
  SELECT * FROM file40                       
  where created &gt; '2017-03-01-00.00.00.000000'
  and regDate &lt; 20170101
  </code></pre>