title: Simple DB2 Query for connection validation
body: <p>I'm looking for a simple DB2 query that can be used to test if a database connection in pool is still valid.  It needs to be a generic query that would execute regardless of which databases exist.</p>
  
  <p>For other database servers, I've used something like 'SELECT 1' or 'SELECT version();'</p>
  
  <p>What would be an equivalent for DB2?</p>
  
  <p>Thanks!</p>