I would advise against that. Dynamic Sampling (DS) does not have the same information that you get from dbms_stats. "The most common misconception is that DS can be used as a substitute for optimizer statistics." 2nd sentence from http://blogs.oracle.com/optimizer/2010/08/dynamic_sampling_and_its_impact_on_the_optimizer.html On Thu, Feb 10, 2011 at 12:16 AM, David Aldridge <david@xxxxxxxxxxxxxxxxxx> wrote: > You could consider not gathering statistics at all -- delete current > statistics and lock the table statistics -- and rely on dynamic sampling. > The usual duration of reporting queries against large tables, particularly > the consequences for the duration if the execution plan is incorrect, > generally make the dynamic sampling overhead acceptable. -- Regards, Greg Rahn http://structureddata.org -- //www.freelists.org/webpage/oracle-l