Oracle SQL中的無效標識符

Question

我沒有在表中用雙引號創建任何columns(PAYMENTTERM) ，但仍然出現以下錯誤：

Error(26,9): PL/SQL: SQL Statement ignored
Error(27,29): PL/SQL: ORA-00904: "P"."PAYMENTTERM": invalid identifier

請指出我在做什么錯以及需要糾正的問題：

CREATE OR REPLACE
PROCEDURE PAYTERMUPDATE
IS
    RecordCount INT;
BEGIN
    SELECT
        count(1) INTO RecordCount 
    FROM 
        docmeta d 
    INNER JOIN temp_pay_term p ON d.XPROJECT_ID = p.PID
    WHERE
        lower(d.PAYMENTTERM) <> lower(p.PAYMENTTERM);

    DBMS_OUTPUT.PUT_LINE('');
    DBMS_OUTPUT.PUT_LINE('There were '
            || to_char(RecordCount)
            || ' records where payment term is mismatch.');
    DBMS_OUTPUT.PUT_LINE('');

    FOR X IN (
        SELECT p.PID, p.PAYMENTTERM
        FROM docmeta d, temp_pay_term p
        WHERE d.XPROJECT_ID = p.PID AND d.PAYMENTTERM <> p.PAYMENTTERM)
    LOOP
       UPDATE docmeta
           SET d.PAYMENTTERM = p.PAYMENTTERM
       WHERE XPROJECT_ID = X.PID;
    END LOOP;

    COMMIT;

EXCEPTION
WHEN OTHERS THEN
      raise_application_error(-1000,
                    'Error occured, No payment term were updated');

END PAYTERMUPDATE;

Answer 1

在這一行：

UPDATE docmeta
SET d.PAYMENTTERM = p.PAYMENTTERM
WHERE XPROJECT_ID = X.PID ; 

您必須在docmeta（d）上添加別名，並且p.PAYMENTTERM別名必須為X

因此，以這種方式更改您的查詢：

UPDATE docmeta d
SET d.PAYMENTTERM = X.PAYMENTTERM
WHERE XPROJECT_ID = X.PID ; 

Answer 2

在您的情況下，將循環變量用作PAYMENTTERM別名，即X ，還將DOCMETA別名聲明為d 。

Answer 3

嘗試這個？

LOOP 
    UPDATE docmeta d
    SET d.PAYMENTTERM = p.PAYMENTTERM
    WHERE XPROJECT_ID = X.PID ; 
  END LOOP;