Need to create another index ?

Hi,
Using Oracle 9.2 I have a table STATS and an index STATS_IDX on the following columns in the order : Objectid, Stat_Hour, Parent.
I now want to optimize queries that filter or sort on Stat_Hour. Do i have to create another index having just Stat_Hour or will Oracle use the existing index to optimize my queries that filter or sort on Stat_Hour ?
Thanks
Christian

Christian,
Since stat_hour is not the leading column of STATS_IDX, you might want to create another index where stat_hour is the leading key in case you want the query to center around stat_hour column.
Please post the query plans with and without indexes if you try the recommendation.
Shakti
http://www.impact-sol.com
Developers of Guggi Oracle - Tool for DBAs and Developers

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For a catalog of about 350 pages, I need both a manufacturer index and a product index. I have read some of the creative solutions already posted here and in other web discussions, and I have an idea.
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Bill Planey wrote:
For a catalog of about 350 pages, I need both a manufacturer index and a product index. I have read some of the creative solutions already posted here and in other web discussions, and I have an idea.
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