I have uploaded an early version of my Oracle hybrid histogram examination script that shows you the estimated row-count (cardinality) numbers when looking up a single value with a simple WHERE col = X condition from a table. You can pull the latest tpt-oracle repo or see it here: https://github.com/tanelpoder/tpt-oracle/blob/master/tabhisthybrid.sql When troubleshooting optimizer’s row-count estimates on tables with histograms, I sometimes end up gradually simplifying the query or pulling ...| tanelpoder.com