卡在PL/SQL上：ORA-00933：SQL命令未正確結束

Question

我看不到我的錯誤。我標記了SQL Developer引用錯誤的地方。你能看到我要去哪裏嗎？ ZCTA5_2000是一個包含數據的有效表。

CREATE OR REPLACE TRIGGER zip_trigger 
    BEFORE INSERT ON ZCTA5_2000 
    FOR EACH ROW 
DECLARE 
    low_zip NUMBER(5); 
    high_zip NUMBER(5); <--- Error PL/SQL: SQL Statement ignored ****** 
BEGIN <-----Error PL/SQL: ORA-00933: SQL command not properly ended ******** 

    SELECT LOW_ZIP, HIGH_ZIP FROM ZIPTABLE 
    INTO low_zip, high_zip 
    WHERE :NEW.STATE = STATE_CODE; <--- Error PLS-00103: Encountered the symbol "END"... 
    IF :NEW.ZIP < LOW_ZIP OR :NEW.ZIP>HIGH_ZIP 
    END IF; 
END; 

Answer 1

看起來行號正在向您報告錯誤。一些前端將做到這一點。

請注意，PLS-00103: Encountered the symbol "END"消息太快三行。假設同爲ORA-00933消息意味着它真的指着SELECT聲明，果然這就是你的錯誤是：

SELECT LOW_ZIP, HIGH_ZIP FROM ZIPTABLE 
INTO low_zip, high_zip <== INTO should be before FROM 
... 

的INTO必須的FROM前SELECT和後。嘗試將其更改爲這樣：

SELECT LOW_ZIP, HIGH_ZIP INTO low_zip, high_zip 
FROM ZIPTABLE 
... 

Answer 2

有可能是不止一個錯誤：

CREATE OR REPLACE TRIGGER zip_trigger 
    BEFORE INSERT ON ZCTA5_2000 
    FOR EACH ROW 
DECLARE 
    low_zip NUMBER(5); 
    high_zip NUMBER(5); 
BEGIN 

    SELECT LOW_ZIP, HIGH_ZIP INTO low_zip, high_zip 
    FROM ZIPTABLE 
    WHERE :NEW.STATE = STATE_CODE; 

    IF :NEW.ZIP < LOW_ZIP OR :NEW.ZIP > HIGH_ZIP THEN 
    NULL; 
    END IF; 
END; 
/

注重排SELECT聲明（SELECT...INTO...FROM而不是SELECT...FROM...INTO）和固定IF聲明（THEN關鍵字和虛擬聲明在IF區塊內）。

Answer 3

FROM來了INTO後和THEN是強制性之後IF那麼你也應該做一些事情時，IF是真實的。

CREATE OR REPLACE TRIGGER zip_trigger 
    BEFORE INSERT ON ZCTA5_2000 
    FOR EACH ROW 
DECLARE 
    low_zip NUMBER(5); 
    high_zip NUMBER(5); 
BEGIN 
    SELECT LOW_ZIP, HIGH_ZIP 
    INTO low_zip, high_zip 
    FROM ZIPTABLE 
    WHERE :NEW.STATE = STATE_CODE; 
    IF :NEW.ZIP < LOW_ZIP OR :NEW.ZIP > HIGH_ZIP THEN 
     null; 
    END IF; 
END;