How to delete records from a table?

It comes to my table structure:
create table BILLS
(
  bill_id    VARCHAR2(20),
  trx_no     VARCHAR2(20),
  item_code  VARCHAR2(3),
  amount     NUMBER,
  item_id    NUMBER,
  invoice_dt DATE
)
Here are some insert statements to populate the table. *(About a 100 of them, please Bear with me) *.
insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104173960', '910873', '002', 432, 351, to_date('04-03-2007', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104209800', '910873', '002', 432, 351, to_date('04-04-2007', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104212747', '263156', '039', 230, 351, to_date('01-04-2007', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104269414', '263156', '039', 230, 351, to_date('01-06-2007', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104360446', '263156', '039', 230, 351, to_date('01-09-2007', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104577673', '910873', '002', 432, 351, to_date('04-04-2008', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104608668', '910873', '002', 432, 351, to_date('04-05-2008', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104611586', '263156', '039', 230, 351, to_date('01-05-2008', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104642560', '910873', '002', 432, 351, to_date('04-06-2008', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104699154', '910873', '002', 432, 351, to_date('04-08-2008', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104820820', '263156', '039', 230, 351, to_date('01-12-2008', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104826028', '910873', '002', 432, 351, to_date('04-12-2008', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104850631', '910873', '002', 432, 351, to_date('04-01-2009', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104885554', '263156', '039', 230, 351, to_date('01-02-2009', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104926901', '910873', '002', 432, 351, to_date('04-03-2009', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104936656', '263156', '', 15, 247, null);

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104996320', '263156', '039', 230, 351, to_date('01-05-2009', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105030104', '263156', '039', 230, 351, to_date('01-06-2009', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105176803', '910873', '002', 432, 351, to_date('04-10-2009', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105217998', '910873', '002', 432, 351, to_date('04-11-2009', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105253306', '263156', '039', 230, 351, to_date('01-12-2009', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105280152', '263156', '039', 230, 351, to_date('01-01-2010', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105318072', '910873', '002', 432, 351, to_date('04-02-2010', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105449712', '910873', '002', 432, 351, to_date('04-06-2010', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105579048', '910873', '002', 432, 351, to_date('04-10-2010', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105611201', '263156', '039', 230, 351, to_date('01-11-2010', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105679991', '263156', '011', 196.56, 351, to_date('06-01-2011', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105686749', '910873', '002', 432, 351, to_date('04-01-2011', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105816473', '910873', '002', 432, 351, to_date('04-05-2011', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105846525', '263156', '011', 230, 351, to_date('01-06-2011', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105778111', '910873', '002', 432, 351, to_date('04-04-2011', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104958496', '910873', '002', 432, 351, to_date('04-04-2009', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105143695', '910873', '002', 432, 351, to_date('04-09-2009', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104176755', '263156', '039', 230, 351, to_date('01-03-2007', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104365552', '910873', '002', 432, 351, to_date('04-09-2007', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104646837', '263156', '039', 230, 351, to_date('01-06-2008', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104763596', '910873', '002', 432, 351, to_date('04-10-2008', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104936656', '263156', '', 15, 247, null);

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105510930', '263156', '039', 230, 351, to_date('01-08-2010', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104302780', '263156', '039', 230, 351, to_date('01-07-2007', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104793590', '263156', '039', 230, 351, to_date('01-11-2008', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104238583', '910873', '002', 432, 351, to_date('04-05-2007', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105779115', '263156', '011', 230, 351, to_date('01-04-2011', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104394481', '263156', '039', 230, 351, to_date('01-10-2007', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105144934', '263156', '039', 230, 351, to_date('01-09-2009', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105342823', '263156', '039', 230, 351, to_date('01-03-2010', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105747780', '910873', '002', 432, 351, to_date('04-03-2011', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105517258', '910873', '002', 432, 351, to_date('04-08-2010', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105617909', '910873', '002', 432, 351, to_date('04-11-2010', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104480711', '910873', '002', 432, 351, to_date('04-01-2008', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105845480', '910873', '002', 432, 351, to_date('04-06-2011', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105349031', '910873', '002', 432, 351, to_date('04-03-2010', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105382599', '263156', '039', 230, 351, to_date('01-04-2010', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104423263', '263156', '039', 230, 351, to_date('01-11-2007', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104482370', '263156', '039', 230, 351, to_date('01-01-2008', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104892872', '910873', '002', 432, 351, to_date('04-02-2009', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105071771', '263156', '039', 230, 351, to_date('01-07-2009', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105716829', '910873', '002', 432, 351, to_date('04-02-2011', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105251149', '910873', '002', 432, 351, to_date('04-12-2009', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105420465', '910873', '002', 432, 351, to_date('04-05-2010', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105547036', '910873', '002', 432, 351, to_date('04-09-2010', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105450806', '263156', '039', 230, 351, to_date('01-06-2010', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105178143', '263156', '039', 230, 351, to_date('01-10-2009', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105648407', '910873', '002', 432, 351, to_date('04-12-2010', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105718070', '263156', '011', 230, 351, to_date('01-02-2011', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104735083', '910873', '002', 432, 351, to_date('04-09-2008', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105748707', '263156', '011', 230, 351, to_date('01-03-2011', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104570555', '263156', '039', 230, 351, to_date('01-04-2008', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105480249', '910873', '002', 432, 351, to_date('04-07-2010', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104799512', '910873', '002', 432, 351, to_date('04-11-2008', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105036878', '910873', '002', 432, 351, to_date('04-06-2009', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105413781', '263156', '039', 230, 351, to_date('01-05-2010', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105548204', '263156', '039', 230, 351, to_date('01-09-2010', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104510445', '910873', '002', 432, 351, to_date('04-02-2008', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104545120', '263156', '039', 230, 351, to_date('01-03-2008', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104700608', '263156', '039', 230, 351, to_date('01-08-2008', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104765006', '263156', '039', 230, 351, to_date('01-10-2008', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105111984', '910873', '002', 432, 351, to_date('04-08-2009', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105310993', '263156', '039', 230, 351, to_date('01-02-2010', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105481415', '263156', '039', 230, 351, to_date('01-07-2010', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105210719', '263156', '039', 230, 351, to_date('01-11-2009', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105809981', '263156', '011', 230, 351, to_date('01-05-2011', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104328833', '910873', '002', 432, 351, to_date('04-08-2007', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104511904', '263156', '039', 230, 351, to_date('01-02-2008', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105278905', '910873', '002', 432, 351, to_date('04-01-2010', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104421567', '910873', '002', 432, 351, to_date('04-11-2007', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104851866', '263156', '039', 230, 351, to_date('01-01-2009', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105649424', '263156', '039', 230, 351, to_date('01-12-2010', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104729022', '263156', '039', 230, 351, to_date('01-09-2008', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105070358', '910873', '002', 432, 351, to_date('04-07-2009', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104299829', '910873', '002', 432, 351, to_date('04-07-2007', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104920099', '263156', '039', 230, 351, to_date('01-03-2009', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104266551', '910873', '002', 432, 351, to_date('04-06-2007', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104994904', '910873', '002', 432, 351, to_date('04-05-2009', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104910999', '263156', '', 15, 247, null);

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104241418', '263156', '039', 230, 351, to_date('01-05-2007', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104960203', '263156', '039', 230, 351, to_date('01-04-2009', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105381371', '910873', '002', 432, 351, to_date('04-04-2010', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104542458', '910873', '002', 432, 351, to_date('04-03-2008', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104670160', '910873', '002', 432, 351, to_date('04-07-2008', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105105026', '263156', '039', 230, 351, to_date('01-08-2009', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104392347', '910873', '002', 432, 351, to_date('04-10-2007', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104451005', '910873', '002', 432, 351, to_date('04-12-2007', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104453960', '263156', '039', 230, 351, to_date('01-12-2007', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104671563', '263156', '039', 230, 351, to_date('01-07-2008', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('104331181', '263156', '039', 230, 351, to_date('01-08-2007', 'dd-mm-yyyy'));

insert into BILLS (BILL_ID, TRX_NO, ITEM_CODE, AMOUNT, ITEM_ID, INVOICE_DT)
values ('105580192', '263156', '039', 230, 351, to_date('01-10-2010', 'dd-mm-yyyy'));
It comes to my select statement.
SELECT 
       Trx_No,
       Item_Code,
       Amount,
       Item_Id,
       MAX(Invoice_Dt)
  FROM Bills
 GROUP BY 
          Trx_No,
          Item_Code,
          Amount,
          Item_Id
I want to remove the lines that are extracted from my select statement. What is the best way to achieve this?

SELECT query sets.

She literally takes

delete from bills
 where (Trx_No,Item_Code,Amount,Item_Id,Invoice_Dt) in (select Trx_No,Item_Code,Amount,Item_Id,MAX(Invoice_Dt)
                                                          FROM Bills
                                                         GROUP BY Trx_No,Item_Code,Amount,Item_Id
                                                       )

Concerning

Etbin

Tags: Database

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