PL / SQL触发器和多次更新

Question

I've written a Trigger that only allows an update to a products price if it is at least 10% above cost. It appears to be working when I update one products price, however I need it to be able to update multiple products at once. Any suggestions? Thanks to anyone who can help.

create or replace TRIGGER P_check
BEFORE UPDATE ON ProductCat
FOR EACH ROW
BEGIN
IF (:new.ListPrice < :old.TotalCost * 1.1) THEN
 raise_application_error (-20500, :new.ListPrice || ' is too low so the price stays '  ||:old.ListPrice);
 ELSE
 dbms_output.put_line ('Price was updated and the new price is ' || :new.ListPrice);
 END IF;
END;

Answer 1

It should work fine. You have the trigger defined as FOR EACH ROW ; thus, your trigger will be invoked for each row changed in ProductCat .

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