Query in other schema take long time????

Hi All,
I am working on two different schemas in the same database say A and B.
In schema A, I have a table tbl which is having approximately 70,000 rows.
The table tbl is having an index. When I query on this table tbl in schema A the query out put is given in 10 minutes.
But when I query on the same table tbl in schema B the out put takes an hour.
Please explain me the reason why the query takes such a long time in schema B.
Thanks in advance
Kaustubh

Please post the execution plans of the query from both databases.
Do you have proper statistics gathered on these tables?

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user13344656 wrote:
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why it take long time?See PL/SQL forum FAQ
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Query in other schema take long time????

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