How to create PARTITION table by?

I have huge table(1million records) which affect query performance. I notice it may help by partitioning it into two. One contains heavily used records and another the rest. However Partition By Range seems applicable to LESS THAN. What I want to do is something like ' EST_TYP in ('L','N')' etc.
Anyone can help? Any other advice on perf improvement? What I have done: 1>Reduced the no of EXT. 2>Created Index.
Thanks in Advance
Yiguang

I have huge table(1million records) which affect query performance. I notice it may help by partitioning it into two. One contains heavily used records and another the rest. However Partition By Range seems applicable to LESS THAN. What I want to do is something like ' EST_TYP in ('L','N')' etc.
Anyone can help? Any other advice on perf improvement? What I have done: 1>Reduced the no of EXT. 2>Created Index.
Thanks in Advance
Yiguang

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