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Does Count(*) do full table scan

VivekSreeApr 9 2014 — edited Apr 9 2014

I need couple of clarifications on the way oracle processes queries:

Would a count(*) on a table do full-table scan?
Which is the setting to make oracle use multi-core or make it run on a specific core in multi-core environment?

This is required for scaling issues which we are facing with respect to oracle.

Thanks

Vivek

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Locked on May 7 2014

Added on Apr 9 2014

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