text: use tutorial;
  
  SELECT *
  FROM comments_by_follower;
  
  SELECT count(*)
  FROM comments_by_follower;
  
  SELECT *
  FROM comments_by_follower
  WHERE artist_username = 'Ruby';
  // Does not work. We would need to make artist_username a clustering key ((follower_username), artist_username, comment_date)
  // This is why you need to consider your queries before you design your tables
  
  SELECT *
  FROM comments_by_post;
  
  SELECT *
  FROM comments_by_post
  WHERE comment_date > '2016-4-12 09:30:00';
  // We discussed this in class. Cassandra would need to go to all rows and all nodes which is not efficient.
  // A great explanation can be found here: http://www.datastax.com/dev/blog/allow-filtering-explained-2
  
  SELECT *
  FROM comments_by_post
  WHERE post_ID= 2 AND comment_date > '2016-4-12 09:30:00';
  // Strangely, I get an error in developer but can execute the query here and in the cql shell without problems.
  // Bug in the developer? Because this query is efficient and should not have troubles with performance.
  
  
  
  
  