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Message Posted: Sun, 08 Aug 2004 @ 10:42:07 GMT


     
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Subj:   How to read Explain Outputs?
 
From:   Manish Kumar Maurya

Hi All,

Recently I faced question like

1) How to make out whether optimizer has used a join index if it exists, using the Explain outputs or whether it uses a secondary index or primary index, or hash index?

2) can we guarantee the use of a index for a particular type of sql?

3) What happens if a mload script happens to load duplicate row in the target table? And how can we come out of such situations


MKM



     
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