title: Add day to InfluxDB query select clause
body: <p><br />
  Hello, people.</p>
  
  <p>Is there a way to add days to an InfluxDB query, like we do in MySQL?</p>
  
  <p>Something like this:</p>
  
  <p><code>SELECT time + 1d, last(field) AS point FROM measurement</code></p>
  
  <p>We can use time literals in the WHERE clause, but can we use them on the SELECT one?</p>
  
  <p>Thanks.</p>