Question

我有一个supplier_product表（supp_id，prod_id，invoice_id，price）和一张发票表（invoice_id，balance）。我试过一个存储过程。给（supp_id）它应该是所有现有的invoice_id并显示余额。这是我的代码：

set serverouput on;
create or replace
Procedure SUP_loop
(v_SUPPLIER_ID int   )
AS
  CURSOR c_SUP IS
    select  SUPPLIER_ID , SUPP_INVOICE_ID, balance 
      from SUPPLIER_PRODUCT, supplier_invoice
     where SUPPLIER_ID=v_SUPPLIER_ID 
       and supp_invoice_id.supplier_product=supp_invoice_id.supplier_invoice;
BEGIN
  --LOOP WITH IMPLICIT VARIABLE DECLARED 
  --AUTOMATIC, OPEN FETCH, CLOSE

  FOR v_SUP_data IN c_SUP LOOP
    DBMS_OUTPUT.PUT_LINE(TO_CHAR(v_SUP_data.SUPPLIER_ID) || '   ' || 
                             TO_CHAR(v_SUP_data.SUPP_INVOICE_ID) || '   ' || 
                             TO_CHAR(v_SUP_data.balance)  );
  END LOOP;
END;
/

我得到的错误是v_sup_data错误（20,31）：PLS-00364：循环索引变量'V_SUP_DATA'使用无效

Error(9,74): PL/SQL: ORA-00904: "SUPP_INVOICE_ID"."SUPPLIER_INVOICE": invalid identifier

Answer 1

你有错误的方式交换字段和表名。

你有......

supp_invoice_id.supplier_invoice

......你应该拥有......

supplier_invoice.supp_invoice_id

：d

Answer 2

引用列的语法是＆lt;＆gt;。＆lt;＆gt ;.因此，您的游标查询需要连接条件为supplier_produce.supp_invoice_id = supplier_invoice.supp_invoice_id，即

create or replace
Procedure SUP_loop
(v_SUPPLIER_ID int   )
AS
  CURSOR c_SUP IS
    select  SUPPLIER_ID , SUPP_INVOICE_ID, balance 
      from SUPPLIER_PRODUCT, supplier_invoice
     where SUPPLIER_ID=v_SUPPLIER_ID 
       and supplier_product.supp_invoice_id = supplier_invoice.supp_invoice_id;
BEGIN
  --LOOP WITH IMPLICIT VARIABLE DECLARED 
  --AUTOMATIC, OPEN FETCH, CLOSE

  FOR v_SUP_data IN c_SUP LOOP
    DBMS_OUTPUT.PUT_LINE(TO_CHAR(v_SUP_data.SUPPLIER_ID) || '   ' || 
                             TO_CHAR(v_SUP_data.SUPP_INVOICE_ID) || '   ' || 
                             TO_CHAR(v_SUP_data.balance)  );
  END LOOP;
END;
/

oracle存储过程以获得给定参数的总和（余额）

2 个答案: