sql - Oracle 中插入后触发插入 sysdate

Question

我尝试使用以下命令，但显然它是无效的 SQL:

CREATE OR REPLACE TRIGGER QUESTION_DATE BEFORE INSERT ON QUESTION 
FOR EACH ROW
BEGIN
INSERT INTO QUESTION(CREATED_TIMESTAMP) 
VALUES (SYSDATE);
END;

到目前为止，问题表如下所示:

CREATE TABLE QUESTION
(   
    QUESTION_ID             INTEGER not null,
    LATEST_QUESTION         INTEGER not null,
    CREATED_USER_ID         INTEGER not null,
    CREATED_TIMESTAMP       TIMESTAMP not null,     
    CONSTRAINT PK_QUESTION  PRIMARY KEY (QUESTION_ID)
);

CREATE SEQUENCE QUESTION_ID_SEQ INCREMENT BY 1 START WITH 1 NOCYCLE NOCACHE NOORDER;

CREATE TRIGGER QUESTION_INSERT BEFORE INSERT ON QUESTION 
FOR EACH ROW
BEGIN
SELECT QUESTION_ID_SEQ.nextval
INTO :new.QUESTION_ID
FROM dual;
END;

如果相关，我正在使用 Toad for Oracle V9.0.1.8

Answer 1

不要使用触发器在 Oracle 中设置默认值。相反，请在列上使用“DEFAULT”。这是一个示例列

CREATED_TIMESTAMP  TIMESTAMP  DEFAULT SYSDATE  NOT NULL,