Re: Will Index be Used - ORDER BY MYFIELD DESC?

In SqlPlus try:

Set autotrace ON

run the query each way( with and without the DESC ) and see which uses the index

 delphidev2000_at_yahoo.com (Delphi Dev 2000) wrote:

>Will the index be used in the following scenario on Oracle 8i? I have
>browsed through the news groups and it appears that there is no clear
>answer to this. I have tried to do some speed benchmarks myself.
>Sometimes it seems that the query takes longer while other times it is
>quicker; I suspect that there may be some caching going on.
>
>In any event, can you traverse backwards on indexes that are not
>created with the "DESC" keyword?
>
>Create Index MYINDEX ON MYTABLE(MYFIELD);
>SELECT MYFIELD FROM MYTABLE WHERE MYFIELD <= 'XXXXXX' ORDER BY MYFIELD
>DESC;
>
>
>Thanks, Mark

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