Re: Index question

Hi,

There are a couple of tables to help you out...

user_indexes (or all_indexes) will show you the indexes and their associated tables.
user_ind_columns (or all_ind_columns) will show the columns contained within the index (multiple rows per index potentially).

In your example, an index on the item column is the only thing which will help.

Try:

create index ind_itemloc_item on itemloc(item);

Then issue:

analyze table itemloc estimate statistics;

Look at the manuals for additional info on the above statements - you might want to add a tablespace clause to the "create index" statement for example. The analyze command will provide Oracle with information about the index so that it knows when to use or not use the index.

Finally, is the itemloc column a number or string column. If it's a number column then don't wrap quotes around the supplied number - the implicit datatype conversion can cause Oracle to ignore the index.

Regards,

      Mark.

                                                                                       
                                                 
                      "Teresita Castro"                                                
                                                 
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Hi!
I am new using Oracle, and what to ask some doubt about indexes

How can I see how many fields of a table have indexes?

I am trying to do an update but is too slow, so what I am trying to find is the way to uses an index that can help to do this update more quickly. This is the query example:

Update ITEMLOC
SET AVERAGE_COST=5.5
WHERE ITEM='0010096' I will like to find the way to set and index that have the item filed include to do this update quicker. Right now it takes like 30 seconds per item and we have to update like 9,000 items.

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