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 Originally Posted by raghav.s.dba
...obviously when you create an index execution plan would show you index lookup...
Not necessarily - it all depends on cardinality; as a rule of thumbs Oracle optimizer will choose FTS rather than index scan if more than 15% of the rows have to be retrieved.
Pablo (Paul) Berzukov
Author of Understanding Database Administration available at amazon and other bookstores.
Disclaimer: Advice is provided to the best of my knowledge but no implicit or explicit warranties are provided. Since the advisor explicitly encourages testing any and all suggestions on a test non-production environment advisor should not held liable or responsible for any actions taken based on the given advice.
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