title: Retrieving rows in physical order
body: <p>Let's say I have a table that has the following data inserted in order:</p>
  <pre><code>name     age
  tom      20
  sarah    30
  </code></pre>
  <p>Is there a way to retrieve the rows that orders it by its 'default ordering' (usually physical location on disk/memory)? Two examples might be:</p>
  <pre><code>SELECT * FROM tbl -- guarantee it's ordered properly either implicitly or explicitly
  SELECT LAG OVER (ORDER BY ...?) FROM tbl
  </code></pre>
  <p>I know this is not a strictly ASNI SQL topic as the rows are not ordered when defined mathematically, but I'm looking to see if it's possible to implement this in actuality.</p>