title: Check Data with Esper + Twitter4J
body: <p>I am using Esper with Twitter4J to process Data from the Twitterstream. Now I want to compare current Data with all Data from the last 10 seconds. I want to check, if someone posts two or more Tweets in a time slice of 10 seconds. Whats Statement for such a check? Or do you check such outside of the Esper Statement?</p>
  
  <p>My statement is right now:</p>
  
  <pre><code>String expression = "select user, sum(ctr) from Tweet.win:time(10 seconds) having user IN (select user from Tweet.win:time(10 seconds))";
  </code></pre>
  
  <p>I know that this is wrong, because two identical variables are being compared, but i don't know how to check, if the same user was ound in the last 10 seconds...</p>
  
  <p>I appreciate any help.</p>