Mindaugas wrote:
  And I cannot use some index organized table or table partitioned by From :) 
because there are at least 2 similar indexes by which queries can be executed - 
From and To.


This makes things a bit tough. One trick is to vertically partition the table into two new tables - with "From" in one and "To" in the other... then you can (horizontally) partition or cluster on each of these columns separately.

You can make it reasonably transparent by using a view to combine the columns again to get something that looks like the original table.

Cheers

Mark

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