ORACLE存储过程的问题

我现在写了段存储过程，代码如下：
create or replace procedure kehu is
begin MERGE INTO  tbl_customer_temp B
USING (
  SELECT ID,
   name,
   phone,
   mobile,
   address,
   buyMachineType,
   buyDate,
   buyAddress,
   buyPrice,
   customerType,
   vipCard,
   content,
   email,
   area_id,
   area_code,
   area_name,
   importDirection
  FROM tbl_customer_amt_temp A
  WHERE A.IMPORTDIRECTION=1
)A
ON (B.ID=A.ID)
WHEN MATCHED THEN UPDATE SET 
  B.name=A.name,
  B.phone=A.phone,
  B.mobile=A.mobile,
  B.address=A.address,
  B.buyMachineType=A.buyMachineType,
  B.buyDate=A.buyDate,
  B.buyAddress=A.buyAddress,
  B.buyPrice=A.buyPrice,
  B.customerType=A.customerType,
  B.vipCard=A.vipCard,
  B.content=A.content,
  B.email=A.email,
  B.area_id=A.area_id,
  B.area_code=A.area_code,
  B.area_name=A.area_name,
  B.importDirection=A.importDirection
WHEN NOT MATCHED THEN INSERT (B.ID,
   B.name,
   B.phone,
   B.mobile,
   B.address,
   B.buyMachineType,
   B.buyDate,
   B.buyAddress,
   B.buyPrice,
   B.customerType,
   B.vipCard,
   B.content,
   B.email,
   B.area_id,
   B.area_code,
   B.area_name,
   B.importDirection)
values (A.ID,A.name,A.phone,A.mobile,A.address,A.buyMachineType,
A.buyDate,A.buyAddress,A.buyPrice,A.customerType,A.vipCard,A.content,A.email,A.area_id,A.area_code,
A.area_name,A.importDirection);
    UPDATE tbl_customer_amt_temp A
     SET IMPORTDIRECTION = 3
   where A.Importdirection = 1; end kehu;想问下用PLSQL Developer怎么执行？