Hi, sorry I had read the documentation, and an article I found http://www.oug-ottawa.org/oougpresentations/2003jan23_advanced_queuing.zip But I still can't figure out when you SHOULD use it, I don't know if you could please give an example about the use of this features. Please ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx put 'unsubscribe' in the subject line. -- Archives are at //www.freelists.org/archives/oracle-l/ FAQ is at //www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------