aa8d7cd2_Cost_Based_Oracle_Fundamentals__Comments
[Chapter] Chapter 6 [Last addendum] 26th Aug 2012 [Title] Selectivity Issues [Comments] 
Chapter three was a simple introduction to selectivity – but there are plenty of quirks, oddities and traps. This chapter looks at the commonest ways that Oracles produces an unsuitable selectivity, and how the code keeps changing with each version of the optimizer.
Cost Based Oracle Fundamentals
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