Re: How to analyze a odd column distribution

  • From: Wolfgang Breitling <breitliw@xxxxxxxxxxxxx>
  • To: aleon68@xxxxxxxxx
  • Date: Wed, 19 Jan 2005 12:08:33 -0700

If you have a histogram then the optimizer should correctly recognize 
the historic outliers.

How did you create the histogram, what does dba_histograms contain for 
that column and what are the problem queries like?

BTW I see a Y3K problem looming.

Alfonso León wrote:

> Hello everyone:
> Now there
> are about 5 million records and half of them are historic so there are
> 2.5 million records with 31-dec-2999 and it is confusing the
> optimizer.


Wolfgang Breitling
Centrex Consulting Corporation

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