Get the group by query faster

Hi,
I have one group by query which has joins of 2 tables and also the joining columns has indexes.
But the query takes quite time to get the output.
Is there any way to get the output of group by clause faster.
The query is given below
SELECT a.description,a.type_of_item,a.item_type_id ,b.city_code,COUNT(1)
FROM PPBS_ITEM_MASTER a,PPBS_INV_SIM_SERIAL b
WHERE b.item_type_id = a.item_type_id
AND b.status='AA'
GROUP BY a.description,a.type_of_item,a.item_type_id ,b.city_code
Kumar

Did you do some explain plan and possibly tkprof on the query to see what it is doing?
what is the explan plan?
tkprof output?
what optimizer is in use?
are stats gathered? if yes, how?
how many rows are in base tables?
how many rows do you get from the query?
how many rows are matching the condition b.status = 'AA' ?
you can replace that COUNT(1) with a COUNT(*) without any loss of performance.

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