title: Display custID for customers who ordered the exact book > 1
body: <p>The goal is to find customers who ordered the same book > 1 on an order. For example:</p>
  
  <pre><code>order_id |order_line |book_id | quantity | order_price
  --------- ----------- -------- --------- -----------
  33034      1           1619      10         $35
  33034      2           1619       5         $16
  </code></pre>
  
  <p>Is this correct?</p>
  
  <pre><code>SELECT distinct cust_id
      ,(SELECT cust_name_last
        FROM bkorders.customers AS CS
        WHERE CS.cust_id = OH.cust_id) AS cust_name_last
  FROM bkorders.order_headers AS OH
  WHERE EXISTS
      (SELECT 1
       FROM bkorders.order_details AS OD
       WHERE order_id &gt; 1
       AND OD.order_id = OH.order_id
       HAVING COUNT(distinct order_line) &gt; 1)
  </code></pre>
  
  <p>I have attached a screenshot of the three tables I am using.
  <img src="https://i.stack.imgur.com/ruMXv.png" alt="enter image description here"></p>
  
  <p>Edit: We are only to use subqueries for this task</p>