title: Laravel 4 where in condition with DB::select query
body: <p>I have next SQL query:</p>
  
  <pre><code>SELECT summary_table.device_id, WEEKDAY(summary_table.day) as day, AVG(summary_table.shows) as avg_shows
      FROM (
           SELECT device_id, day, sum(shows) as shows
           FROM statistics
           GROUP BY device_id, day
      ) as summary_table
      WHERE device_id IN (1,2,3) // Just for example
      GROUP BY device_id, WEEKDAY(day)
  </code></pre>
  
  <p>How should I execute this using Laravel? I put this query in DB::select function, but how can I place all ids in "WHERE device_id IN (?)" condition? I tried using "array(implode(',', $var))" but it doesnt work. If I have ids like "13, 14" I get results only for id = 13.</p>
  
  <p>So the question is how to place instead of "?" array of ids?</p>