title: Adding limit with variable causing error SQL syntax
body: <p>I want to add <code>limit</code> dynamically with variable, but it gave me an error. something like this:</p>
  <p>routes/api/post.js</p>
  <pre class="lang-js prettyprint-override"><code>..
  // req.params.limit = 3
  const limit = req.params.limit
  
  models.post
     .findAll({
        subQuery: false,
        order: [[&quot;createdAt&quot;, &quot;DESC&quot;]],
        include: [&quot;post_picture&quot;, &quot;tags&quot;],
        limit
     })
  ..
  </code></pre>
  <p>gave me an error</p>
  <pre class="lang-js prettyprint-override"><code>Unhandled rejection SequelizeDatabaseError: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the 
  right syntax to use near ''3'' at line 1
  </code></pre>
  <p>If I set manually <code>limit: 3</code> it works, but that will be a nightmare for pagination. Is this a bug or did I do something wrong?</p>