Performance tuning needed for a query.

Question

Hi all,
I am facing problem to extract data and insert into another table. I need to fetch part number from all_parts_already and then based on the result I need to extract place from all_parts and insert into all_parts_already.
Sample data in the tables:
table all_parts_already:
part part_desc technique company place
1 A Engine TVS B1
1 Av Engine TVS B2
1 Ab Engine TVS B3
2 Ah Engine TVS B3
2 Ap Engine TVS B2
table all_parts:
technique company place
Engine TVS B1
Kim TVS B2
Engine TVS B3
Engine TVS B4
XXXXX TVS B5
Engine TVS B6
for c1 in (select distinct parts from all_parts_already where
technique = 'Engine' and
Company = 'TVS' ) loop
     for c2 in (select distinct place from all_parts where
               technique = 'Engine' and
               Company ='TVS' and
               minus
               select distinct Place from all_parts_already where
               technique = 'Engine' and
               Company = 'TVS' and
               parts = c1.parts ) loop
               insert into all_parts_already (select c2.place,place_desc,c1.parts,c2.place from place_master where parts=c1.parts and place=c2.place);
     end loop;          
end loop;
the data i am dealing with is in millions. One technique may have 1000 parts. One part may have 500 places. So the loop runs that many times creating the delay.
Please tell me how to move forward.I am getting the output i need but the time it takes is too much(goes on to days)
Thanks a lot
:)

Answer 1

Hi this is the Oracle Designer forum. You may be better asking over at one of the database/sql/plsql forums