title: How to use the physical location of rows (ROWID) in a DELETE statement
body: <p>I have a table that has a lot of duplicated rows and no primary key.<br>
  I want to remove just the duplicated records, but when I try to do this it would remove all peers.</p>
  
  <p>How can I find the <code>ROWID</code> from a table in Postgres?</p>