title: In a Rails WHERE LIKE query, what does the percent sign mean?
body: <p>In a simple search like this:</p>
  
  <pre><code>find.where('name LIKE ?', "%#{search}%")
  </code></pre>
  
  <p>I understand that <code>#{search}</code> is just string interpolation. What do the <code>%</code> symbols do? </p>