Question

我正在尝试创建一个更新PRODUCTOS表中某个产品库存的触发器，当在COMPRAS上插入新购买时触发此触发器

CREATE OR REPLACE TRIGGER TRIGGER_COMPRAS
AFTER INSERT ON DCOMPRAS
    FOR EACH ROW
    DECLARE
    NEWSTOCK NUMBER;
    BEGIN
        SELECT STOCK
        INTO NEWSTOCK
        FROM PRODUCTOS
        WHERE ID_PRODUCTO = :NEW.ID_PRODUCTO;

        NEWSTOCK := NEWSTOCK + :NEW.CANTIDAD;

        UPDATE INTO PRODUCTOS
        (STOCK)
        VALUES
        (NEWSTOCK)
        WHERE ID_PRODUCTO = :NEW.ID_PRODUCTO;

END TRIGGER_COMPRAS;

但是当我尝试运行它时，它会给我：

ERROR at line 9: PLS-00103: Encountered the symbol "=" when expecting one of the following:

   := . ( @ % ;
7.             SELECT STOCK
8.             INTO NEWSTOCK
9.             FROM PRODUCTOS
10.             WHERE ID_PRODUCTO = :NEW.ID_PRODUCTO;
11.             NEWSTOCK := NEWSTOCK + :NEW.CANTIDAD;

------------ ----------- EDIT

更改了NEWSTOCK：= NEWSTOCK +：NEW.CANTIDAD; 但是，另一个错误：

ERROR at line 11: PL/SQL: ORA-00903: invalid table name
1. CREATE OR REPLACE TRIGGER TRIGGER_COMPRAS
2.     AFTER INSERT ON DCOMPRAS
3.         FOR EACH ROW

Answer 1

最终陈述必须是这样的

CREATE OR REPLACE TRIGGER TRIGGER_COMPRAS
AFTER INSERT ON DCOMPRAS REFERENCING OLD AS OLDREC NEW AS NEWREC FOR EACH ROW
DECLARE
    NEWSTOCK NUMBER;
BEGIN
        SELECT STOCK
        INTO NEWSTOCK
        FROM PRODUCTOS
        WHERE ID_PRODUCTO = :NEW.ID_PRODUCTO;

        NEWSTOCK := NEWSTOCK + :NEW.CANTIDAD;

        UPDATE PRODUCTOS
           SET STOCK = NEWSTOCK 
        WHERE ID_PRODUCTO = :NEW.ID_PRODUCTO;

END TRIGGER_COMPRAS;

使用oracle 10g触发PL SQL ERROR

1 个答案: