Need to tune this query

Question

Hi
I dont know anything about tuning
can anybody help to tune this query
SQL> set autotrace traceonly explain
SQL> select count(*) from ibs_x_t_receipts c
  2  where exists                          
  3  (Select 1 from ibs_s_i_doc_receipt a,ibs_x_t_bill b
  4   where A.app_fr_doc_no = c.receipt_no
  5     and a.app_to_doc_no = b.doc_no
  6     and a.app_to_tr_type = 'TRN001'
  7     and A.app_fr_tr_type = 'TRN002'
  8     and b.bill_month <= '31-dec-2008'
  9     and b.balance_ser_amt = 0
10     and b.balance_tax_amt = 0)
11  /
Execution Plan
   0      SELECT STATEMENT Optimizer=ALL_ROWS (Cost=212880 Card=1 Byte
          s=21)
   1    0   SORT (AGGREGATE)
   2    1     NESTED LOOPS (Cost=212880 Card=1 Bytes=21)
   3    2       VIEW OF 'VW_SQ_1' (VIEW) (Cost=212878 Card=1 Bytes=14)
   4    3         HASH (UNIQUE)
   5    4           NESTED LOOPS
   6    5             NESTED LOOPS (Cost=212878 Card=1 Bytes=66)
   7    6               VIEW OF 'index$_join$_002' (VIEW) (Cost=30021
          Card=91387 Bytes=3564093)
   8    7                 HASH JOIN
   9    8                   INDEX (RANGE SCAN) OF 'SIDOC_INDX1' (INDEX
          ) (Cost=171215 Card=91387 Bytes=3564093)
  10    8                   INDEX (RANGE SCAN) OF 'SIDOC_INDX2' (INDEX
          ) (Cost=366130 Card=91387 Bytes=3564093)
  11    6               INDEX (UNIQUE SCAN) OF 'ITL_PK2' (INDEX (UNIQU
          E)) (Cost=1 Card=1)
  12    5             TABLE ACCESS (BY INDEX ROWID) OF 'IBS_X_T_BILL'
          (TABLE) (Cost=2 Card=1 Bytes=27)
  13    2       INDEX (UNIQUE SCAN) OF 'RECEIPTS_PK2' (INDEX (UNIQUE))
           (Cost=1 Card=1 Bytes=7)it is running like anything, i didn't get the result.
Please help me
kanish

Answer 1

--untested
SELECT COUNT (*)
  FROM ibs_x_t_receipts c
WHERE EXISTS (
          SELECT 1
            FROM ibs_s_i_doc_receipt a
           WHERE a.app_fr_doc_no = c.receipt_no
             AND a.app_to_tr_type = 'TRN001'
             AND a.app_fr_tr_type = 'TRN002'
             AND EXISTS (
                    SELECT 1
                      FROM ibs_x_t_bill b
                     WHERE a.app_to_doc_no = b.doc_no
                       AND b.bill_month <= '31-dec-2008'
                       AND b.balance_ser_amt = 0
                       AND b.balance_tax_amt = 0))regards,
friend
Edited by: most wanted!!!! on Apr 17, 2012 3:51 AM