title: Oracle: no wait / no fail on update statement
body: <p>I have many competing update statements in a multi-application environment. With the current design, deadlocks are frequent. </p>
  
  <p>All but one of the updates can be skipped if necessary and updated at the next interval.</p>
  
  <p>Can I apply NOWAIT to the update statement? Can I have my statement silently fail when it can't obtain a lock? Can I specify the length time it attempts to get a lock?</p>