title: Multiple matches with Postgres regexp_matches
body: <p>I trying to use Postgres regexp_matches function to pull hashtags out of a string... The following example returns only a match - how do I extract both hashtags?</p>
  
  <pre><code>regexp_matches("Hello #world #planet", '#([A-Za-z0-9]+)')
  </code></pre>
  
  <p>Cheers, 
  Andrei</p>