title: How can CREATE SERVER postgresql can be useful
body: <p>I'm studying for a test and because i never needed use the "CREATE SERVER" command i don't know what is your function. </p>
  
  <p>I read in PostgreSQL official page but is not clear to me. I would like to see a real case where i can use a "CREATE SERVER" (Foreign Server) with a "CREATE USER MAPPING FOR".</p>
  
  <p>Thanks anyway.</p>