title: How to get current database and user name with `select` in PostgreSQL?
body: <p>I'm using <code>PostgreSQL 9.2</code>.</p>
  <p>Is there any way to get an output like,</p>
  <blockquote>
  <p>Database : mydb, User : myUser</p>
  </blockquote>
  <p>using a <em>select</em> query?</p>