一个批量更新的存储过程如何写？

  create table t_ItemInfo(
  autoId int primary key,
  classId int not null,
  nclassId int not null,
  amount int ,--商品数量
  title varchar2(100) not null,
  content varchar2(200) not null,
  price float not null,
  remark varchar2(200),
  filePath varchar2(200),
  fileName varchar2(200),
  addtime date
);

create table t_OrderInfo(
  orderNo int,
  dAID int,
  oBalance int,--订单总价//
  ordertime date,
  payType varchar2(50),--付款类型：货到付款、银行转帐
  sendType varchar2(50),  --发货方式
  hasapproved int, --订单可否多几种状态“等待处理、已发货、已结束
  result varchar(200),  
  approvedUserId int,
  approvedDate date,
  constraint PK_OrderInfo_orderNo primary key(orderNo),
  CONSTRAINT FK_OrderInfo_userID FOREIGN KEY (userID) REFERENCES t_UserInfo ( autoId)
);

create table t_orderView(
  autoId int,
  orderNo int not null,
  itemID int not null,
  itemName varchar2(100) not null,
  itemCount int,
  price float not null,
constraint PK_orderView_orderDId primary key(autoId),
  CONSTRAINT FK_orderView_orderNo FOREIGN KEY (orderNo)
      REFERENCES t_OrderInfo (orderNo)
);

create or replace procedure Order_processed
(p_oid in t_OrderInfo.orderNo%TYPE )
as
CURSOR  c1 IS
SELECT itemId,itemCount  
FROM t_orderView  
WHERE rderNo = p_oid;  
v_itemId int;
v_amount int;
v_itemCount int;
begin
update t_OrderInfo set hasapproved=1, approvedDate=sysdate where rderNo=p_oid;
--更新OrderTab中的字段

  FOR r1 IN c1 LOOP
         v_itemId  :=r1.itemId;
         v_itemCount  := r1.itemCount;
         SELECT amount into v_amount from t_iteminfo where t_iteminfo.autoid = r1.itemid;
         v_amount := v_amount-v_itemCount;
   
  
   UPDATE t_iteminfo  SET amount=v_amount WHERE t_iteminfo.autoid = r1.itemid;
   
   END LOOP;

  
   COMMIT;

end Order_processed;