title: Mysql - delete error :subquery returns more than 1 row
body: <pre><code>DELETE FROM PRODUCT WHERE ID = 22;
  </code></pre>
  
  <p>I was trying to delete a product using the query above and I got the error message:</p>
  
  <p>Subquery returns more than 1 row</p>
  
  <p>I have tried to use mysql workbrench to delete the product, still return the same error. Is this mysql bug?</p>