title: How to filter many conditions in months of the same year?
body: <p>I want to filter my database in transaction in May and June 2017. Here's my syntax but it was false:  </p>
  
  <pre><code>SELECT
      order_buyer.buyer_id 
  FROM order_buyer 
  WHERE month(createdAt)=5 
  AND month(createdAt)=6 
  AND year(createdAt)=2017 
  GROUP BY order_buyer.buyer_id;
  </code></pre>