title: How to set file expiry
body: <p>In Cosmos SCOPE script, we can set the stream/file expiration date using the following code: </p>
  
  <pre><code>OUTPUT Catalog
  TO SSTREAM @Output
  WITH STREAMEXPIRY @ExpirationInDays;
  </code></pre>
  
  <p>What is the equivalent syntax in U-SQL?</p>