title: What is the meaning of '@' symbol in Oracle SQL?
body: <p>What is the <code>@</code> symbol mean in <a href="/questions/tagged/oracle" class="post-tag" title="show questions tagged &#39;oracle&#39;" rel="tag">oracle</a>? </p>
  
  <p>For example:</p>
  
  <pre><code>select * from question_answer@abcd where id = '45'
  </code></pre>