Question

创建新触发器时，我不知道我的问题。我的语法是否正确？谢谢！ Console Logging pane

p / s：当我尝试插入值时，我的控制台显示

＆＃13;

CREATE OR REPLACE TRIGGER EX03_3 
BEFORE INSERT ON HR.CHITIETDATHANG
FOR EACH ROW
DECLARE 
    TONGHANG NUMBER; -- Total Items  
    HANGHIENCO NUMBER; -- Items present
    HANGDABAN NUMBER; -- Items was sales.
BEGIN
    -- Get total Items
    SELECT SUM(MH.SOLUONG) INTO TONGHANG
    FROM HR.MATHANG MH;

    -- Get total Items was sales
    SELECT SUM(CTDH.SOLUONG) INTO HANGDABAN
    FROM HR.CHITIETDATHANG CTDH;
    
    -- Items present
    HANGHIENCO := TONGHANG - HANGDABAN;
    
    IF(HANGHIENCO >= HANGDABAN) THEN
        HANGHIENCO := HANGHIENCO-1;
        INSERT INTO HR.CHITIETDATHANG VALUES(:NEW.SOHOADON,:NEW.MAHANG,
            :NEW.GIABAN,:NEW.SOLUONG,:NEW.MUCGIAMGIA);
        ROLLBACK;
    END IF;
  NULL;
END;

＆＃13;

Answer 1

似乎有两个严重的错误

1）触发器尝试在HR.CHITIETDATHANG的插入触发器的主体中插入HR.CHITIETDATHANG。

2）在insert语句无用之后使用rollback。

注意：我在这些select语句中看到没有任何相关的提升no_data_found。正如Kaushik Nayak所说，EX03_3和EX04_4感到困惑。

Oracle Trigger - 插入前的条件

1 个答案: