PL/Sql查询执行错误

Question

这是我的查询。自动将销售代理存储在名为“ExcellentSale”的单独 table 中的触发器姓名、车型和厂家名称，每次约定价格 SalesTransaction 超过汽车要价的 20%。（注意：你需要创建实施此触发器之前的“ExcellentSale”table。要创建主键，请使用从 1 开始并递增 1 的序列）。它显示这样的错误

ERROR at line 23: PL/SQL: ORA-00942: table or view does not exist
1. create or replace trigger filltable
2. after insert on salestransaction
3. for each row
4. declare

触发器的代码是：

create or replace trigger filltable
after insert on salestransaction
for each row
declare
aname varchar2(25);
modname varchar2(25);
manfname varchar2(25);
askpr number;
agrpr number;
begin
select sa.name,m.name,mf.name
into   aname,modname,manfname
from   manufacturer mf,model m, car c, salestransaction st, salesagent sa
where mf.manufacturerid = m.manufacturerid and
m.modelno = c.modelno and
c.vin = st.vin and
st.agentid = sa.agentid;

select askingprice,agreedprice
into askpr,agrpr
from car c,salestransaction st
where c.VIN = St.vin;

if(agrpr > askpr*1.2) then

insert into excellentsales values(agent_seq.nextval,aname,modname,manfname);

end if;

end filltable;

/


create table excellentsales
(agentid varchar2(5) not null,
agentname varchar2(25),
carmodel varchar2(25),
mfname varchar2(25),
primary key(agentid))

CREATE SEQUENCE agent_seq START WITH 1 INCREMENT BY 1;

Answer 1

您不需要在 SALESTRANSACTION 的行触发器中查询 SALESTRANSACTION - 您应该改为在调用触发器的 SALESTRANSACTION 行上使用 :NEW 值。我建议将您的触发器重写为：

create table excellentsales
(EXCELLENTSALES_ID  NUMBER
   CONSTRAINT PK_EXCELLENTSALES
   PRIMARY KEY
     USING INDEX,
agentid varchar2(5) not null,
agentname varchar2(25),
carmodel varchar2(25),
mfname varchar2(25))

CREATE SEQUENCE EXCELLENTSALES_SEQ
  START WITH 1
  INCREMENT BY 1;

create or replace trigger filltable
  after insert on salestransaction
  for each row
declare
  aname varchar2(25);
  modname varchar2(25);
  manfname varchar2(25);
  askpr number;
  agrpr number;
begin    
  SELECT m.NAME, mf.NAME, c.ASKINGPRICE
    INTO modname, manfname, askpr
    FROM CAR c
    INNER JOIN MODEL m
      ON m.MODELNO = c.MODELNO
    INNER JOIN MANUFACTURER mf
      ON mf.MANUFACTURERID = m.MANUFACTURERID
    WHERE c.VIN = :NEW.VIN;

  SELECT sa.NAME
    INTO aname
    FROM SALESAGENT sa
    WHERE sa.AGENTID = :NEW.AGENTID;

  agrpr := :NEW.AGREEDPRICE;

  if agrpr > askpr * 1.2 then
    insert into excellentsales (EXCELLENTSALES_ID, AGENTID, AGENTNAME, CARMODEL, MFNAME)
      values(EXCELLENTSALES_SEQ.nextval, :NEW.AGENTID, aname, modname, manfname);
  end if;
end filltable;

我还重新设计了您的 EXCELLENTSALES table 以包含一个不是 AGENTID 的主键。由于最初设计的 EXCELLENTSALES 没有记录实际的 AGENTID（显然应该来自 SALESTRANSACTION），在现实世界中可能需要它，例如，用于支付佣金。

PL/Sql查询执行错误

PL/Sql query execution error

oracle

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