Question

    DECLARE
    VEN2_ID_VAR NUMBER := 124;
    VEN2_ID NUMBER;
    VEN2_NAME VARCHAR2(50);
    INV2_ID NUMBER;
    INV_TOTAL NUMBER(9,2);
    INV_TOTAL_PAY NUMBER(9,2);
    INV_BALANCE NUMBER (9,2);
    INV_DATE DATE;
    INV_DUE_DATE DATE;

     BEGIN
     SELECT VENDORS2.VENDOR_ID, VENDOR_NAME, INVOICE_ID, INVOICE_TOTAL,     PAYMENT_TOTAL , BALANCE, INVOICE_DATE, INVOICE_DUE_DATE
     INTO VEN2_ID, VEN2_NAME, INV2_ID, INV_TOTAL , INV_TOTAL_PAY, INV_BALANCE,   INV_DATE, INV_DUE_DATE
     FROM INVOICES2 INNER JOIN VENDORS2 ON VENDORS2.VENDOR_ID = INVOICES2.VENDOR_ID
     WHERE VENDORS2.VENDOR_ID = VEN2_ID_VAR ;

     DBMS_OUTPUT.PUT ( 'VENDOR ID: ' || VEN2_ID || ', ' );
     DBMS_OUTPUT.PUT ( 'VENDOR NAME: ' || VEN2_NAME || ', ' );
     DBMS_OUTPUT.PUT ( 'INVOICE ID: ' || INV2_ID || ', ' );
     DBMS_OUTPUT.PUT ( 'INVOICE TOTAL: ' || INV_TOTAL || ', ' );
     DBMS_OUTPUT.PUT ( 'INVOICE TOTAL PAYMENT: ' || INV_TOTAL_PAY || ', ' );
     DBMS_OUTPUT.PUT ( 'BALANCE DUE: ' || INV_BALANCE || ', ' );
     DBMS_OUTPUT.PUT( 'INVOICE DATE: ' || TO_CHAR(INV_DATE, 'MON DD,RRRR')  || ', ' );
     DBMS_OUTPUT.PUT_line( 'INVOICE DUE DATE: ' || TO_CHAR(INV_DUE_DATE, 'MON DD,RRRR'));
     END; 
     /

这是我试图在Oracle Pl / SQL中运行的代码，但是VEN2_ID_VAR NUMBER：= 124在数据库中有多行，因此它表示无法获取多行，然后重写查询以获取多行。我该怎么办？

Answer 1

如果是这种情况，你可以使用光标：

  DECLARE
      VEN2_ID_VAR NUMBER := 124;
      VEN2_ID NUMBER;
      VEN2_NAME VARCHAR2(50);
      INV2_ID NUMBER;
      INV_TOTAL NUMBER(9,2);
      INV_TOTAL_PAY NUMBER(9,2);
      INV_BALANCE NUMBER (9,2);
      INV_DATE DATE;
      INV_DUE_DATE DATE;
      cursor c1 is SELECT VENDORS2.VENDOR_ID VEN2_ID, VENDOR_NAME VEN2_NAME, INVOICE_ID INV2_ID, INVOICE_TOTAL INV_TOTAL,PAYMENT_TOTAL INV_TOTAL_PAY, BALANCE INV_BALANCE, INVOICE_DATE INV_DATE, INVOICE_DUE_DATE INV_DUE_DATE
       FROM INVOICES2 INNER JOIN VENDORS2 ON VENDORS2.VENDOR_ID = INVOICES2.VENDOR_ID
       WHERE VENDORS2.VENDOR_ID = VEN2_ID_VAR;

       BEGIN
       for a in c1 loop

       DBMS_OUTPUT.PUT ( 'VENDOR ID: ' || a.VEN2_ID || ', ' );
       DBMS_OUTPUT.PUT ( 'VENDOR NAME: ' || a.VEN2_NAME || ', ' );
       DBMS_OUTPUT.PUT ( 'INVOICE ID: ' || a.INV2_ID || ', ' );
       DBMS_OUTPUT.PUT ( 'INVOICE TOTAL: ' || a.INV_TOTAL || ', ' );
       DBMS_OUTPUT.PUT ( 'INVOICE TOTAL PAYMENT: ' || a.INV_TOTAL_PAY || ', ' );
       DBMS_OUTPUT.PUT ( 'BALANCE DUE: ' || a.INV_BALANCE || ', ' );
       DBMS_OUTPUT.PUT( 'INVOICE DATE: ' || TO_CHAR(a.INV_DATE, 'MON DD,RRRR')  || ', ' );
       DBMS_OUTPUT.PUT_line( 'INVOICE DUE DATE: ' || TO_CHAR(a.INV_DUE_DATE, 'MON DD,RRRR'));
       end loop;
       END; 
       /

循环中的PL / SQL BLOCK

1 个答案: