title: Does Oracle SQL support output parameters in system functions?
body: <p>In Oracle SQL, do any of the system functions (listed on <a href="http://docs.oracle.com/database/121/SQLRF/functions001.htm" rel="nofollow">http://docs.oracle.com/database/121/SQLRF/functions001.htm</a>) support output parameters, or do they only return a value?</p>
  
  <p>I know that in Oracle PL/SQL, a function can return values and can contain output parameters, but do any SQL system functions themselves have output parameters?</p>