小编use*_*756的帖子

我已经运行此代码来创建此触发器,因为我需要使用插入TABLE1中的相同序列号的行的UID值更新TABLE2.

CREATE OR REPLACE TRIGGER TRIG_NAME BEFORE INSERT ON TABLE1 FOR EACH ROW
DECLARE
  seq NUMBER(10);
  uid CHAR(36);
  BEGIN
    seq  := :new.SEQ;
    uid  := :new.UID;
    UPDATE TABLE2 SET TABLE2.UID = uid WHERE TABLE2.SEQ = seq;
    DBMS_OUTPUT.put_line('UPDATE TABLE2 SET UID = '||uid||' WHERE SEQ = '||seq||';');
END;

触发似乎没有问题,所以我

SET SERVEROUTPUT ON;

然后

INSERT INTO TABLE1 (SEQ, UID) VALUES (47, 'TEST_VALUE');

并获得预期的输出

UPDATE TABLE2 SET UID = TEST_VALUE                            WHERE SEQ = 47;

因此,正确的值似乎会进入触发器.然后我通过运行检查TABLE2

SELECT SEQ,UID FROM TABLE2 WHERE SEQ = 47;

得到 …