title: What are the tables whose names start with `TT_`?
body: <p>Using this SQL statement to find in my database <a href="https://stackoverflow.com/a/2729160/5769938">all tables the have columns</a> whose names contain <code>ItemId</code>:</p>
  <pre><code>SELECT o.name,
         c.name
  FROM sys.columns c
  INNER JOIN sys.objects o ON c.object_id = o.object_id
  WHERE c.name LIKE '%ItemId%'
  ORDER BY o.name, c.column_id
  </code></pre>
  <p>I received a result containing two tables:</p>
  <p><code>ResourceData</code>
  <code>TT_Data_117F9D94</code></p>
  <p>I know about the <code>ResourceData</code> table and I can find it in the list of my tables.</p>
  <p>But I have not been able to find in my database any table name <code>TT_Data_117F9D94</code>.</p>
  <p>Any idea where/how did this table show up in the result of my query?</p>