Martin, I don't know about modifying an existing FB histogram. Just create the entire histogram from scratch, its is documented and there are examples on the net ( e.g. my own website ) on how to do it. Just use the number for the two values from the existing histogram and then add the 0 and the frequency you want to assign to it. Email me directly if you need specific help. On Mon, 13 May 2013 14:18:40 +0200, Martin Klier <usn@xxxxxxxxx> wrote: Dear list, > > how can I manually add a bucket to an existing Frequency Based histogram? > -- Wolfgang Breitling Centrex Consulting Corporation -- //www.freelists.org/webpage/oracle-l