Demonstrate how to use DELETE with bulk processing. : bulk collect « PL SQL Statements « Oracle PL/SQL Tutorial






SQL>
SQL>
SQL>
SQL> create table employee_history
  2          (
  3           empl_no                integer         primary key
  4          ,lastname               varchar2(20)    not null
  5          ,firstname              varchar2(15)    not null
  6          ,midinit                varchar2(1)
  7          ,street                 varchar2(30)
  8          ,city                   varchar2(20)
  9          ,state                  varchar2(2)
 10          ,zip                    varchar2(5)
 11          ,zip_4                  varchar2(4)
 12          ,area_code              varchar2(3)
 13          ,phone                  varchar2(8)
 14        ,company_name         varchar2(50)
 15          );

Table created.

SQL>
SQL>
SQL>
SQL> insert into employee_history(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(9,'OK','Joe','T','9 Ave','Kansas City','MO','65602','3658','415', '456-4563','A Inc');

1 row created.

SQL>
SQL> insert into employee_history(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(12,'Yes','Larry','T','1 Rd.','Newarkville','NJ','27377','3298','908', '123-7384','B Inc');

1 row created.

SQL>
SQL> insert into employee_history(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(13,'No','Cindy','T','13 Street','Warwick','RI','07377','3298','401', '123-7384','C Inc');

1 row created.

SQL>
SQL> insert into employee_history(empl_no,lastname,firstname,midinit,street,city,state,zip,zip_4,area_code,phone,company_name)
  2  values(14,'Fine','Doris','R','11th Ave','New York','NY','22299','3222','212', '123-1234','D Inc');

1 row created.

SQL>
SQL>
SQL>
SQL> create table ord(
  2           order_no               integer          primary key
  3          ,empl_no                integer
  4          ,order_date             date not null
  5          ,total_order_price      number(7,2)
  6          ,deliver_date           date
  7          ,deliver_time           varchar2(7)
  8          ,payment_method         varchar2(2)
  9          ,emp_no                 number(3,0)
 10          ,deliver_name           varchar2(35)
 11          ,gift_message           varchar2(100)
 12  );

Table created.

SQL>
SQL>
SQL> insert into ord(order_no,empl_no,order_date,total_order_price,deliver_date,deliver_time,payment_method,emp_no,deliver_name,gift_message)
  2           values(1,1,'14-Feb-2002', 23.00, '14-Feb-2002', '12 noon', 'CA',1, null, 'Gift for wife');

1 row created.

SQL> insert into ord(order_no  ,empl_no ,order_date ,total_order_price ,deliver_date ,deliver_time ,payment_method ,emp_no,deliver_name ,gift_message )
  2           values(2,1,'14-Feb-2003', 510.98, '14-feb-2003', '5 pm', 'NY',7, 'Rose Ted', 'Happy Valentines Day to Mother');

1 row created.

SQL> insert into ord(order_no  ,empl_no ,order_date ,total_order_price ,deliver_date ,deliver_time,payment_method ,emp_no,deliver_name ,gift_message )
  2           values(3, 2,'14-Feb-2004', 315.99, '14-feb-2004', '3 pm', 'VS',2, 'Ani Forest', 'Happy Valentines Day to Father');

1 row created.

SQL> insert into ord(order_no  ,empl_no ,order_date ,total_order_price ,deliver_date ,deliver_time,payment_method ,emp_no,deliver_name ,gift_message )
  2           values(4, 2,'14-Feb-1999', 191.95, '14-feb-1999', '2 pm', 'NJ',2, 'O. John', 'Happy Valentines Day');

1 row created.

SQL> insert into ord(order_no  ,empl_no ,order_date ,total_order_price ,deliver_date ,deliver_time,payment_method ,emp_no,deliver_name ,gift_message    )
  2           values(5, 6,'4-mar-2002', 101.95, '5-mar-2002', '2:30 pm', 'MO'    , 2, 'Cora', 'Happy Birthday from John');

1 row created.

SQL> insert into ord(order_no  ,empl_no ,order_date ,total_order_price ,deliver_date ,deliver_time,payment_method ,emp_no,deliver_name ,gift_message )
  2           values(6, 9,'7-apr-2003', 221.95, '7-apr-2003', '3 pm', 'MA', 2, 'Sake Keith', 'Happy Birthday from Joe' );

1 row created.

SQL> insert into ord(order_no  ,empl_no ,order_date ,total_order_price ,deliver_date ,deliver_time,payment_method ,emp_no,deliver_name ,gift_message )
  2           values(7, 9,'20-jun-2004', 315.95, '21-jun-2004', '12 noon', 'BC', 2, 'Jessica Li', 'Happy Birthday from Jessica');

1 row created.

SQL> insert into ord(order_no  ,empl_no ,order_date ,total_order_price ,deliver_date ,deliver_time,payment_method ,emp_no,deliver_name ,gift_message )
  2           values (8, 12, '31-dec-1999', 135.95, '1-jan-2000', '12 noon', 'DI',   3, 'Larry', 'Happy New Year from Lawrence');

1 row created.

SQL> insert into ord(order_no  ,empl_no ,order_date ,total_order_price ,deliver_date ,deliver_time,payment_method ,emp_no,deliver_name ,gift_message )
  2           values (9, 12, '26-dec-2003', 715.95, '2-jan-2004', '12 noon', 'SK',7, 'Did', 'Happy Birthday from Nancy' );

1 row created.

SQL> insert into ord(order_no  ,empl_no ,order_date ,total_order_price ,deliver_date ,deliver_time,payment_method ,emp_no,deliver_name ,gift_message )
  2           values(10, 4, sysdate-1, 119.95, sysdate+2, '6:30 pm', 'VG',2, 'P. Jing', 'Happy Valentines Day to Jason');

1 row created.

SQL> insert into ord(order_no  ,empl_no ,order_date ,total_order_price ,deliver_date ,deliver_time,payment_method ,emp_no,deliver_name ,gift_message )
  2           values(11, 2, sysdate, 310.00, sysdate+2, '3:30 pm', 'DC',2, 'C. Late', 'Happy Birthday Day to Jack');

1 row created.

SQL> insert into ord(order_no  ,empl_no ,order_date ,total_order_price ,deliver_date ,deliver_time,payment_method ,emp_no,deliver_name ,gift_message)
  2           values(12, 7, sysdate-3, 121.95, sysdate-2, '1:30 pm', 'AC',2, 'W. Last', 'Happy Birthday Day to You');

1 row created.

SQL> insert into ord(order_no  ,empl_no ,order_date ,total_order_price ,deliver_date ,deliver_time,payment_method ,emp_no,deliver_name ,gift_message)
  2           values(13, 7, sysdate, 211.95, sysdate-4, '4:30 pm', 'CA',2, 'J. Bond', 'Thanks for hard working');

1 row created.

SQL>
SQL>
SQL>
SQL> -- First, review row-at-a-time processing:
SQL> declare
  2      type cust_array_type is table of number
  3           index by binary_integer;
  4      employee_array  cust_array_type;
  5  begin
  6      select empl_no bulk collect
  7      into employee_array from employee_history;
  8
  9      FOR i IN employee_array.FIRST..employee_array.LAST LOOP
 10         delete from ord where empl_no = employee_array(i);
 11         dbms_output.put_line(sql%rowcount);
 12      END LOOP;
 13  end;
 14  /
2
2
0
0

PL/SQL procedure successfully completed.

SQL>
SQL>
SQL> drop table employee_history;

Table dropped.

SQL>
SQL> drop table ord;

Table dropped.








22.17.bulk collect
22.17.1.select BULK COLLECT
22.17.2.Adding a limit to BULK COLLECT
22.17.3.To get the same result by using explicit cursors and bulk collect
22.17.4.Speeding Up Data Collection with Bulk Operations
22.17.5.Using the RETURNING ...BULK COLLECT clause to SELECT directly into a PL/SQL array
22.17.6.Demonstrate how to use DELETE with bulk processing.
22.17.7.Bulk processing with the FORALL statement
22.17.8.Bulk collect with non-cursor SELECT into multiple collections
22.17.9.Bulk collect from cursor with LIMIT option