Please help me tune this query

Question

Hi,
Could you please suggest how the below query can be tuned? At present the query takes an hour to execute for a single transaction.
===================================================================
/* Formatted on 2009/07/27 17:44 (Formatter Plus v4.8.8) */
SELECT 'x' x,
SUBSTR (cn.trx_number, 1, INSTR (cn.trx_number, 'CN') - 1) invoice_num,
DECODE (INSTR (cn.trx_number, 'CNT'),
0, '¿¿¿¿¿¿¿¿ (CREDIT NOTE)',
'¿¿¿¿¿¿¿¿ (CREDIT NOTE) / ¿¿¿¿¿¿¿¿¿¿¿'
) report_name,
INSTR (cn.trx_number, 'CNT') v_or_nv,
xxth_get_info.get_org_name (:org_id) head_office_name, lc.location_id,
lc.location_code, lc.attribute1 tax_regis_number,
lc.attribute2 tax_payer_id, lc.attribute14 branch_number,
lc.attribute15 name_of_place_of_business,
lc.address_line_1 || ' ' || lc.address_line_2 address_line1,
lc.address_line_3 || ' ' || lc.region_1 address_line2,
lc.region_2
|| ' '
|| lc.town_or_city
|| ' '
|| lc.postal_code
|| ' '
|| lc.country address_line3,
cn.type_cn, cn.rac_bill_to_customer_name, cn.address1,
cn.raa_bill_to_address3, cn.bill_to_site_use_id, cn.trx_date,
cn.trx_number, cn.rac_bill_to_customer_num, cn.description,
ABS (cn.extended_amount) extended_amount, ABS (cn.tax_amt) tax_amt,
rc.trx_rec_number, rc.apply_date, rc.cash_receipt_id
FROM ra_cust_trx_types cc,
hr_locations_v lc,
(SELECT b.cash_receipt_id, a.trx_number, b.trx_rec_number,
b.apply_date
FROM ar_payment_schedules a, ar_app_adj_v b,ar_cash_receipts c
WHERE b.payment_schedule_id = a.payment_schedule_id
AND c.cash_receipt_id=b.cash_receipt_id
AND c.status='APP'
AND b.CLASS = 'Payment'
group by b.cash_receipt_id, a.trx_number, b.trx_rec_number,b.apply_date) rc,
(SELECT 'B' type_cn, a.customer_trx_id, a.cust_trx_type_id,
a.rac_bill_to_customer_name,
a.raa_bill_to_address1
|| ' '
|| a.raa_bill_to_address2 address1,
a.raa_bill_to_address3, a.bill_to_site_use_id, a.trx_date,
a.trx_number,
( SUBSTR (a.trx_number, 1,
INSTR (a.trx_number, 'CN', -1) - 1)
|| SUBSTR (a.trx_number, INSTR (a.trx_number, 'CN', -1) + 2)
) trx_number_cmp,
a.rac_bill_to_customer_num,
ctl.description, -- b.description
sum(nvl(ctl.gross_extended_amount, ctl.extended_amount)) extended_amount, -- V2.0
-- SUM (c.extended_amount) tax_amt -- V2.0
select SUM (ctl_tax.extended_amount)
from ra_customer_trx_lines ctl_tax,
ra_customer_trx_lines ctl_line
WHERE ctl_tax.link_to_cust_trx_line_id = ctl_line.customer_trx_line_id
AND ctl_tax.line_type = 'TAX'
AND ctl_tax.customer_trx_id = a.customer_trx_id
) tax_amt
FROM ra_customer_trx_partial_v a,
ra_customer_trx_lines ctl,
ra_customer_trx ct,
ra_cust_trx_types ctt,
hz_cust_acct_sites radd,
hz_party_sites party_site,
hz_locations loc,
hz_cust_site_uses site
-- ra_customer_trx_lines_v b
-- ar_tax_summ_v c
WHERE a.ctt_class = 'CM'
AND ctl.line_type = 'LINE'
&P_CUSTOMER_NUM_CLAUSE
&P_CUST_TRX_NUM_CLAUSE
-- AND b.customer_trx_id = a.customer_trx_id
AND ctl.customer_trx_id = a.customer_trx_id
AND ctl.customer_trx_id = ct.customer_trx_id
AND ct.cust_trx_type_id = ctt.cust_trx_type_id
AND ctt.TYPE NOT IN ('DEP', 'GUAR', 'BR')
AND ct.bill_to_site_use_id = site.site_use_id
AND site.cust_acct_site_id = radd.cust_acct_site_id
AND radd.party_site_id = party_site.party_site_id
AND loc.location_id = party_site.location_id
-- AND c.customer_trx_id(+) = a.customer_trx_id
GROUP BY a.cust_trx_type_id,
a.rac_bill_to_customer_name,
a.raa_bill_to_address1,
a.raa_bill_to_address2,
a.raa_bill_to_address3,
a.bill_to_site_use_id,
a.trx_date,
a.trx_number,
a.rac_bill_to_customer_num,
a.customer_trx_id,
ctl.description,
(SUBSTR (a.trx_number, 1, INSTR (a.trx_number, 'CN') - 1)
)) cn
WHERE cc.cust_trx_type_id = cn.cust_trx_type_id
AND cc.global_attribute19 = lc.location_code(+)
AND rc.trx_number = cn.trx_number_cmp
=============================================================

Answer 1

Post relevant all details as explained in this instruction:
HOW TO: Post a SQL statement tuning request - template posting