Question about Cost in Oracle Explain Plan
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by Will
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Published on 2010-04-05T16:22:13Z
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2010/04/05
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When Oracle is estimating the 'Cost' for certain queries, does it actually look at the amount of data (rows) in a table?
For example:
If I'm doing a full table scan of employees for name='Bob', does it estimate the cost by counting the amount of existing rows, or is it always a set cost?
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