title: MySQL.. Return '1' if a COUNT returns anything greater than 0
body: <p>I'm trying to create MySQL query that essentially returns true or false.  I'd like to run </p>
  
  <pre><code>SELECT COUNT(id) 
    FROM comments  
   WHERE comment_date &gt;= 1306904400 
     AND user_id = 1 
  </code></pre>
  
  <p>So if the user posted in the forum 10 times this month, I'd like it to return just 1, otherwise I'd like it to return 0 to indicate they haven't.</p>
  
  <p>Is that possible efficiently within SQL?</p>