We have alot of many to many relationships. IOTs sound like a good option. However, our many to many relationships are in a high transaction database. I remember reading that Oracle has to 'guess' the location of IOTs and that if you perform alot of DML those guesses can be inaccurate. anyone have experience with this? ---------------------------------------------------------------- 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 -----------------------------------------------------------------