title: Complex SQL Query w/ Multiple Tables
body: <p>I have the following tables in my database:</p>
  
  <p><strong>Products</strong></p>
  
  <pre><code>ID_PRODUCT
  PRODUCTNAME
  PRICE
  </code></pre>
  
  <p><strong>Customers</strong></p>
  
  <pre><code>ID_CUSTOMER
  NAME
  </code></pre>
  
  <p><strong>Orders</strong></p>
  
  <pre><code>ID_ORDER
  CUSTOMER_ID
  PRODUCT_ID
  QUANTITY
  </code></pre>
  
  <p>How would I select all the customers who ordered 4 products or more?</p>