トリガーによって更新されている値にはどうすればアクセスできますか？

Question

ここにシーケンスによって生成され、私はあなたが取得するCURVALを使用することができます

CREATE OR REPLACE TRIGGER ACCOUNT_NUMBER_TRIG 
    BEFORE INSERT 
    ON ACCOUNTS 
    FOR EACH ROW 
    WHEN (NEW.ACCOUNT_NUMBER is not null) 
DECLARE 
    V_ACC_NO ACCOUNTS.ACCOUNT_NUMBER%TYPE; 
BEGIN 
    SELECT ACCOUNT_NO_SEQ.nextvaL INTO V_ACC_NO FROM DUAL; 
    :NEW.ACCOUNT_NUMBER := V_ACC_NO; 

END ACCOUNT_NUMBER_TRIG; 

------------------------------------------------------------------------------ 

CREATE OR REPLACE TRIGGER ACCOUNTS_TRANSCATION_TRIG_1 AFTER 
    INSERT ON ACCOUNTS FOR EACH ROW DECLARE CURSOR ACCOUNTS_CUR IS 
    SELECT ACCOUNT_NUMBER FROM ACCOUNTS; 
    DECLARE 
    TEMP_1 NUMBER(5,0); 
    BEGIN 
    SELECT ACCOUNTS.ACCOUNT_NUMBER FROM INSERTED INTO TEMP_1 
    OPEN ACCOUNTS_CUR; 
    INSERT 
    INTO TRANSACTIONS VALUES 
     (
     SYSDATE, 
     - :NEW.ACCOUNT_NUMBER, 
     'NEW ACCOUNT', 
     0 
    ); 
    CLOSE ACCOUNTS_CUR; 
    END ACCOUNTS_TRANSCATION_TRIG_1; 

Answer 1

CREATE TABLE accounts(
    ACCOUNT_NUMBER number, 
    ACCOUNT_NAME varchar2(20) 
); 

CREATE SEQUENCE ACCOUNT_NO_SEQ; 


CREATE OR REPLACE TRIGGER ACCOUNT_NUMBER_TRIG 
    BEFORE INSERT 
    ON ACCOUNTS 
    FOR EACH ROW 
    WHEN (NEW.ACCOUNT_NUMBER is not null) 
BEGIN 
    :NEW.ACCOUNT_NUMBER :=ACCOUNT_NO_SEQ.nextvaL; 
END ACCOUNT_NUMBER_TRIG; 
/

---

CREATE TABLE transactions(
    TR_DATE date, 
    TR_ACCOUNT_NUMBER number, 
    TR_TYPE varchar2(20), 
    TR_somenumber int 
); 

CREATE OR REPLACE TRIGGER ACCOUNTS_TRANSCATION_TRIG_1 AFTER 
    INSERT ON ACCOUNTS FOR EACH ROW 
    BEGIN 
    INSERT INTO TRANSACTIONS(TR_DATE, TR_ACCOUNT_NUMBER, TR_TYPE, TR_somenumber) 
    VALUES 
     (
     SYSDATE, 
     :NEW.ACCOUNT_NUMBER, 
     'NEW ACCOUNT', 
     0 
    ); 
    END ACCOUNTS_TRANSCATION_TRIG_1; 
/

---

INSERT INTO accounts(ACCOUNT_NUMBER, ACCOUNT_NAME) VALUES (1111,'My Name'); 

select * from accounts; 
ACCOUNT_NUMBER ACCOUNT_NAME   
-------------- -------------------- 
      2 My Name 

select * from transactions; 
TR_DATE TR_ACCOUNT_NUMBER TR_TYPE    TR_SOMENUMBER 
---------- ----------------- -------------------- ------------- 
2017/07/11     2 NEW ACCOUNT      0 

Answer 2

トリガACCOUNTS_TRANSCATION_TRIG_1によってトランザクションテーブルに挿入する必要がACCOUNT_NUMBER_TRIGトリガによってテーブルが口座に挿入されたACCOUNT_NUMBERの値ですNEXTVALによって返された最新の値：ACOUNT_NUMBERを設定するために使用されているよう

CREATE OR REPLACE TRIGGER ACCOUNTS_TRANSCATION_TRIG_1 AFTER 
    INSERT ON ACCOUNTS FOR EACH ROW DECLARE CURSOR ACCOUNTS_CUR IS 
    BEGIN 
    INSERT 
    INTO TRANSACTIONS VALUES 
     (
     SYSDATE, 
     - ACCOUNT_NO_SEQ.curval, 
     'NEW ACCOUNT', 
     0 
    ); 
    CLOSE ACCOUNTS_CUR; 
    END ACCOUNTS_TRANSCATION_TRIG_1; 

ただし、この場合には必要はありません。

INSERT 
    INTO TRANSACTIONS VALUES 
     (
     SYSDATE, 
     - :NEW.ACCOUNT_NUMBER, 
     'NEW ACCOUNT', 
     0 
    ); 

は、Oracleの古いバージョンである場合を除きところで、この最初のトリガのために働く必要があります。

CREATE OR REPLACE TRIGGER ACCOUNT_NUMBER_TRIG 
    BEFORE INSERT 
    ON ACCOUNTS 
    FOR EACH ROW 
    WHEN (NEW.ACCOUNT_NUMBER is not null) 
BEGIN 
    :NEW.ACCOUNT_NUMBER := ACCOUNT_NO_SEQ.nextvaL; 
END ACCOUNT_NUMBER_TRIG; 

（句が間違っているとき、私は疑う - が nullであるときでなければなりません？）