title: How should I interpret "Select Distinct aliasRefForMe.field1 From a.b@a.c.d aliasRefForMe"
body: <p>Oracle schema table reference <code>a.b@c.d.e aliasRefForMe</code> - what is this?</p>
  
  <p>Not sure what this means for an Oracle select statement.  Anybody know?</p>
  
  <pre><code>Select Distinct aliasRefForMe.field1 From a.b@a.c.d aliasRefForMe
  </code></pre>
  
  <p>Two questions:</p>
  
  <ol>
  <li><p>Does <code>Select ... From a.b.c</code> mean a schema and a sub schema before the table in Oracle?  Do sub schemas even exist?</p></li>
  <li><p>What is the @ for in a.b@a.c.d aliasRefForMe?</p></li>
  </ol>
  
  <p>Note that I changed the table/schema names for company privacy.</p>