index selectivity when histograms presents on the column

List,

Can anyone tell me the index selectivity formula for a column when
there  are histograms on the column.
I know that the index selectivity without histograms is =
num_distinct/num_rows and also know that table selectivity uses
density to calculate the selectivty when there are histograms placed
on the column.

Thanks,
--
Best Regards,
Syed Jaffar Hussain
8i,9i & 10g, OCP DBA
Banque Saudi Fransi,
Saudi Arabia
http://jaffardba.blogspot.com/
----------------------------------------------------------------------------------
"Winners don't do different things. They do things differently."
--
http://www.freelists.org/webpage/oracle-l


Other related posts: