tuning the Skewed joins - response (3) by sureshv

Hi Dieter,
 
Thanks for the reply. I tried with the above union all . the cost is somewhat reduced. but the problem is in the query i have 2 INNER JOINS with this type of skewed column on single side.
 

INNER JOIN TABLE A

ON A.COL /*999*/  = B.COL   /*UPI*/.

There is only 1 value in B.COL with 999 value and in left COL it is skewed with more values.

Please suggest any solution.

Thanks,

Suresh.